The 2019 offseason could make or break the Mavericks.

Among the top of the team's priorities this offseason will be figuring out which of their nine free agents they are planning on keeping.

The Mavericks' free agents this summer: Kristaps Porzingis, Dwight Powell, J.J. Barea, Devin Harris, Trey Burke, Dorian Finney-Smith, Maxi Kleber, Salah Mejri and Daryl Macon.

Now is your time to fill in for Mavs GM Donnie Nelson and decide which free agents the Mavs should keep and who they should let walk.

Kristaps Porzingis, RFA

Dallas Mavericks forward Kristaps Porzingis (6) answers a question as Dallas Mavericks head coach Rick Carlisle looks on during a press conference at American Airlines Center in Dallas on Monday, February 4, 2019. (Vernon Bryant/The Dallas Morning News) (Vernon Bryant / Staff Photographer)

All indications are the Mavs and Porzingis are working toward ensuring he will be back in Dallas next season. Even if Porzingis signs an offer sheet from another team, the Mavs can match and bring him back since he's a restricted free agent.

Not to mention that during his introductory press conference, Mavs owner Mark Cuban said the team's goal is to keep Porzingis and Luka Doncic together "for the next 20 years."

Since being traded to Dallas in February, Porzingis hasn't played for the Mavs and has been sitting out as he recovers from his ACL injury. Prior to the injury, Porzingis was averaging 22.7 points and 6.6 rebounds per game, good enough to earn an NBA All-Star selection.

Dwight Powell (PO)

Dwight Powell is coming off the best season of his career. Powell averaged career highs in points (10.6) field-goal percentage (60%) and 3-point shooting percentage (31%).

He has a player option for next season, but if he opts out he could work out a multi-year deal with the Mavs. Either way, it sounds like it looks like Powell will be back in Dallas next season.

J.J. Barea, UFA

Dallas Mavericks guard J.J. Barea visits with the media a day after the teams last game of the season. The interview took place at the American Airlines Center in Dallas, Thursday, April 11, 2019. (Tom Fox/The Dallas Morning News) (Tom Fox / Staff Photographer)

Before a torn right Achilles tendon brought his season to an early end, J.J. Barea was having one of his most productive years off the bench.

In 38 games, Barea averaged 10.9 points and 5.6 assists in just 19.8 minutes per game.

With Dirk Nowitzki's retirement, Barea is the lone member remaining from the Mavs' 2011 championship team. Barea has played 10 of his 13 seasons in Dallas, but does he still fit into the picture with the youth movement in full effect?

Devin Harris, UFA

Dallas Mavericks guard Devin Harris (34) celebrates a play during the second half a matchup between the Dallas Mavericks and the Houston Rockets on Sunday, March 10, 2019 at the American Airlines Center in Dallas. (Ryan Michalesko/The Dallas Morning News) (Ryan Michalesko / Staff Photographer)

While Devin Harris is at a similar point in his career as Barea, he's coming off one of his worst seasons statistically.

Harris averaged 6.3 points on 38 percent shooting from the floor and 31 percent shooting from 3-point range.

Harris said he would never rule out a return to Dallas, but will the Mavs bring back the 36-year-old guard?

Trey Burke, UFA

Dallas Mavericks guard Trey Burke (23) leans in to Sacramento Kings guard Yogi Ferrell (3) during the second quarter of an NBA game between the Dallas Mavericks and the Sacramento Kings on Tuesday, March 26, 2019 at American Airlines Center in Dallas. (Ashley Landis/The Dallas Morning News) (Ashley Landis / Staff Photographer)

With a stacked backcourt, Trey Burke didn't get many opportunities with the Mavs, but when he did he showed some promise.

In 17.4 minutes per game with the Mavs, Burke averaged 9.7 points on 46 percent shooting from the floor and 36 percent shooting from 3-point range.

But is Burke still a part of the Mavs' future backcourt plans?

Dorian Finney-Smith, RFA

Dallas Mavericks forward Dorian Finney-Smith (10) attempts a layup as Utah Jazz forward Derrick Favors (15) defends during the first half of play at American Airlines Center in Dallas on Wednesday, November 14, 2018. (Vernon Bryant/The Dallas Morning News) (Vernon Bryant / Staff Photographer)

Dorian Finney-Smith had a career-best year for the Mavs in 2018-19.

Finney-Smith averaged a career-high 7.5 points per game with career-high shooting numbers from the floor (43%) and 3-point range (31%). Of course, he was solid as always on the defensive end.

Maxi Kleber, RFA

In his second NBA season, Maxi Kleber built a reputation as a fearless shot-blocker, averaging 1.1 per game in 21.2 minutes.

He also improved offensively, increasing his scoring to 6.8 points per game while shooting 45 percent from the floor and 35 percent from 3-point range.

Salah Mejri, UFA

Dallas Mavericks center Salah Mejri (50) reacts after hitting a first half three-pointer against the Memphis Grizzlies at the American Airlines Center in Dallas, Friday, April 5, 2019. (Tom Fox/The Dallas Morning News) (Tom Fox / Staff Photographer)

Who says an old pony can't learn new tricks?

Although Salah Mejri averaged a career-low 11.1 minutes per game, the 7-2 Tunisian averaged a career-high 3.9 points and added 3-point shooting to his repertoire.

After making just one 3-pointer in his first three seasons with the Mavs, Mejri hit 11 of his 34 attempts from beyond the arc.

Daryl Macon, UFA

Dallas Mavericks players, from top left, Tim Hardaway Jr., Dwight Powell, Maxi Kleber, Dirk Nowitzki, Devin Harris, Trey Burke and Kristaps Porzingis, top right; and, from bottom left, Daryl Macon, J.J. Barea, Courtney Lee, and a member of the staff, bottom right, watch a video tribute to Nowitzki following the team's NBA basketball game against the Phoenix Suns in Dallas, Tuesday, April 9, 2019. (AP Photo/Tony Gutierrez) (Tony Gutierrez / AP)

Daryl Macon appeared in eight games for the Mavericks last season, averaging 3.6 points per game on 37% shooting from the floor, but shot 45% from 3-point range.

Macon averaged 19 points and 6.2 assists per game while shooting 42 percent from the floor for the Texas Legends, the Mavs' G-League affiliate.