Here is a comprehensive look at how the top Coyotes prospects — professional or amateur — performed during the 2018-19 season and what could be next in their respective developments.

Barrett Hayton, Sault Ste. Marie Greyhounds (OHL)

Vitals: 6-foot-1, 192 pounds, 18 years; center, left shot; 2018 first round (No. 5 overall).

2018-19 stats: 26 goals and 66 points in 39 games (six goals and 16 points in 11 playoff games).

Review: Returning to the Greyhounds after the Coyotes selected him with the fifth overall pick in the 2018 draft, Hayton battled through a charlie horse injury and still managed to exceed his previous year's point total despite playing in almost half as many games.

The Coyotes were very encouraged with Hayton's progress this season as well as the leadership position he adopted as a 19-year-old captain. The Greyhounds are loaded with upper-echelon talent — including Philadelphia Flyers prospect Morgan Frost — but Hayton's point-production seemed to be more a product of his individual skill than it was about leaning on those around him.

The Greyhounds made it to the second round of the OHL playoffs but were dispatched by the Saginaw Spirit and fellow Coyotes prospect Ivan Prosvetov.

What's next: There is a chance Hayton could make the Coyotes' roster out of training camp next season (he did so in 2018-19, too) but the fact he played in just 39 games in the OHL could give the Coyotes enough reason to return him to the Greyhounds for 2019-20. Per the terms of the CHL-NHL agreement, Hayton is ineligible to play in the AHL at the start of next season.

The Coyotes inked Nick Schmaltz and Christian Dvorak to long-term deals and still have Derek Stepan signed through 2020-21. With Brad Richardson also under contract through next season, it could make sense for Hayton to take one more year of development before joining the roster as a mainstay at center.

Pierre-Olivier Joseph, Drummondville Voltiguers (QMJHL)

Vitals: 6-foot-2, 168 pounds, 19 years; defense, left shot; 2017 first round (No. 23 overall).

2018-19 stats: Nine goals and 47 points in 62 games (two goals and nine points in 16 playoff games).

Review: Joseph was traded midseason as the captain of the Charlottetown Islanders but still helped a talented Drummondville squad make it to the QMJHL semifinals. The Coyotes were happy with Joseph's performance on and off the ice for both of this teams.

Joseph's numbers were almost exactly on par with his 2017-18 statistics (46 points in 63 games), which suggests the 19-year-old has little else to learn from junior hockey.

What's next: Joseph will turn 20 in July and will almost certainly be assigned to Tucson after the conclusion of training camp. It will be an important season for the slender blue-liner as the Coyotes see how he adapts to the professional game.

Regardless, the Coyotes remain extremely high on Joseph's make-up and hope he can blossom into a top-four defenseman at the NHL level.

Nick Merkley, Tucson Roadrunners (AHL)

Vitals: 5-foot-10, 194 pounds, 21 years; wing, right shot; 2015 first round (No. 30 overall).

2018-19 stats: 10 goals and 34 points in 45 games.

Review: It was a tough season for Merkley after he missed the first 21 games of the season rehabbing from offseason knee surgery. Merkley scored in his second game back and was productive early on, but the 21-year-old endured a grueling 27-game stretch in which he did not score a single goal.

Merkley scored his first professional hat trick on March 29 and was a key player in trying to help the Roadrunners secure a playoff berth, but Tucson's run ultimately fell short. It was a tough year mentally for Merkley, but his numbers were still respectable and still show a player with NHL potential.

What's next: Coyotes head coach Rick Tocchet likes Merkley's game and should give him every chance to make the big club out of training camp. However, Conor Garland's emergence has pushed Merkley back on the depth chart and it is difficult to see an opening on the Coyotes' roster for him.

It certainly wouldn't be the worst thing for Merkley to get more reps in Tucson, as the AHL is still a highly competitive league. Perhaps an offseason of training — and not rehab — will do wonders for Merkley.

Nate Schnarr, Guelph Storm (OHL)

Vitals: 6-foot-3, 190 pounds, 20 years; center, right shot; 2017 third round (No. 75 overall).

2018-19 stats: 34 goals and 102 points in 65 games (eight goals and 19 points in 24 playoff games).

Review: Schnarr's season came to an end on Friday in a 6-4 loss to the Rouyn-Noranda Huskies in the CHL Memorial Cup semifinal. He won't get much time off before the Coyotes' annual prospect development camp kicks off in late June.

Schnarr had what many consider a breakout season for the Storm in 2018-19, serving as a major cog in a team that went further this season than any club housing a Coyotes prospect. The Coyotes have reason to be high on Schnarr, but the 20-year-old still needs to work on his game before he's NHL-ready.

What's next: Schnarr will almost certainly be assigned to Tucson next season, which would be Schnarr's first taste of professional hockey. Like Joseph, this will be a great opportunity for the Coyotes to see exactly what they have in some of these intriguing prospects.

Adin Hill, Tucson Roadrunners (AHL)

Vitals: 6-foot-6, 203 pounds, 23 years; goaltender; 2015 third round (No. 76 overall).

2018-19 stats: 2.61 goals allowed average and .906 save percentage in 36 games.

Review: Hill had a nice season in Tucson and even filled in admirably for the Coyotes when called upon, posting a 2.76 GAA in 13 games with the big club. In Tucson, he performed well in a de-facto tandem with Hunter Miska.

What's next: Unless the Coyotes part ways with Antti Raanta or Darcy Kuemper, it's difficult seeing Hill on the NHL roster to start the 2019-20 season. And with Miska becoming an RFA this summer, Hill could assume even more responsibility in Tucson next season.

Kevin Bahl, Ottawa 67s (OHL)

Vitals: 6-foot-6, 234 pounds, 18 years; defense, left shot; 2018 second round (No. 55 overall).

2018-19 stats: Six goals and 34 points in 68 games (one goal and 10 points in 14 playoff games).

Review: Bahl and the 67s made it all the way to the OHL championship, ultimately losing out to Schnarr and the Storm. Still, Bahl improved his production this season compared to his draft year in 2018 where he managed 18 points in 58 games. The Coyotes remain extremely intrigued by Bahl's size and potential as a second-round pick.

What's next: Bahl won't turn 19 until June 27 and he certainly isn't NHL-ready yet, so the guess here is that the big blue-liner will return to Ottawa for his fourth OHL season. It could be a nice opportunity for Bahl to take on even more of a leadership role with a deep 67s roster.

Jan Jenik, Hamilton Bulldogs (OHL)

Vitals: 6-foot-1, 165 pounds, 18 years; center, left shot; 2018 third round (No. 65 overall).

2018-19 stats: 13 goals and 30 points in 27 games (one assist in two playoff games).

Review: Jenik did quite a bit of bouncing around in his first post-draft season. He played for a couple of Czech professional teams as well before playing the bulk of his games with the Bulldogs, with whom he put up impressive numbers. Jenik also played well at the World Junior tournament for the Czech Republic.

What's next: Jenik should find himself back in Hamilton for a full season. Still just 18, more development in the OHL will do him good.

Kyle Capobianco, Tucson Roadrunners (AHL)

Vitals: 6-foot-1, 196 pounds, 21 years; defense, left shot; 2015 third round (No. 63 overall).

2018-19 stats: Seven goals and 32 points in 40 games.

Review: The Coyotes were very pleased with Capobianco's season in Tucson and rewarded him with a promotion to the big club, but Capobianco tore his ACL during his second game with the Coyotes. Still, the 2018-19 season was one for the 21-year-old to build upon.

What's next: The Coyotes are fairly set on defense heading into the offseason so the guess here is that, once Capobianco completes his rehab, Tucson would be the likely destination. He would assume a leadership role there. That said, the Coyotes are very intrigued by Capobianco's future potential in the NHL.

Ivan Prosvetov, Saginaw Spirit (OHL)

Vitals: 6-foot-5, 176 pounds, 20 years; goaltender; 2018 fourth round (No. 114 overall).

2018-19 stats: 2.94 goals allowed average and .910 save percentage in 53 games (2.38 GAA and .930 save percentage in 12 playoff games).

Review: Prosvetov was having a tremendous playoff campaign until he was suspended during the Spirit's OHL semifinal bout with Guelph for batting a puck out of play. Although the Coyotes remain highly intrigued by Prosvetov's combination of size and flexibility, Prosvetov will need to work on compressing his lively personality. His suspension may have cost Saginaw a spot in the OHL championship.

What's next: This was just Prosvetov's first year in the OHL and, despite putting up good numbers, odds are he will head back to Saginaw for at least one more season. Prosvetov should be at the Coyotes' prospect development camp sometime after the June draft.

Filip Westerlund, Frolunda HC/Timra IK (SHL)

Vitals: 5-foot-11, 181 pounds, 20 years; defense, right shot; 2017 second round (No. 44 overall).

2018-19 stats: Three goals and four points in 23 games.

Review: Westerlund still has yet to come over the North America and hasn't found much success playing professionally in Sweden, either. Westerlund, who was an intriguing right-handed defenseman as a draft prospect, hasn't progressed much since the Coyotes took him in the second round in 2017.

What's next: There is a chance Westerlund could make the transition to North America and play with Tucson next season, but it's unclear whether he would leave Sweden. Westerlund underwent shoulder surgery that cut his season short, although it isn't expected to delay is 2019-20 season.

Liam Kirk, Peterborough Petes (OHL)

Vitals: 6-foot-1, 168 pounds, 19 years; wing, left shot; 2018 seventh round (No. 189 overall).

2018-19 stats: 26 goals and 47 points in 63 games.

Review: Kirk, the Coyotes' seventh-round pick in 2018, got his first taste of North American hockey after becoming the first English-born and English-trained player to ever be selected in the NHL draft. Kirk got off to a slow start with the Petes but rebounded to post respectable numbers for an OHL rookie.

What's next: This was a huge year in Kirk's development and he seems to be clearing all the hurdles. He is a long way away, though, and will almost certainly be headed back to Peterborough next season.

Richard Morin covers the Coyotes and Diamondbacks for azcentral sports. He can be reached at rmorin@arizonarepublic.com. Follow him on Twitter @ramorin_azc. Subscribe to azcentral today.