Some moments you just don’t forget. One of those for me was when Roberto Pérez smacked two bombs in Game 1 of the 2016 World Series.

This stuck with me not because I’m a closet Indians fan, but because of how utterly random it was. Pérez’s power explosion came out of nowhere. He had to work hard to end the regular season with a .186 batting average. The Elias Sports Bureau even noted that it was the lowest regular-season batting average for a multihomer hitter in World Series history. To that point, Pérez had hit three homers in the regular season, and his career high had been eight.

That second homer went a long way and is burned into my memory. I remember thinking that this was a big dude, and maybe he had some latent power. Yet, Pérez thereafter seemed to go not with a bang but with a whimper. In 2017 and 2018, he hit .188 with a total of 10 homers, 38 runs, and 57 RBI. Accordingly, he slipped my mind.

This year, though, Pérez is steamrolling the catching competition. He already has 16 homers, 31 runs and 38 RBI with a .255 average. Yet, for some reason he’s owned in only 12.2% of ESPN leagues. Opportunity knocked when the Indians traded Yan Gomes to Washington on November 30, 2018. While at the beginning of the season Pérez was splitting time more evenly with backup Kevin Plawecki, Pérez’s bat has earned him the lion’s share of the plate appearances, with a career-high 76 in June.

So what’s going on here? And is it sustainable? As always, to answer these questions, we need to go deep.

Elevation

Sometimes, the easiest answer is looking at whether a player has joined the fly-ball revolution. At first blush, results for Pérez are mixed on this front.

Sure, it doesn’t appear that Pérez is elevating much better than before. Going from an average launch angle of 5.3 degrees to 6.6 degrees won’t really move the needle into slugger territory, and doesn’t explain why Pérez has experienced a massive power surge. Likewise, if you just looked at FanGraphs’ batted-ball types, you’d see that Pérez’s fly-ball rate has decreased from 35.5% to 32.2%.

Yet, that fly-ball rate includes infield flies, which Pérez has dropped from 13.2% to 6.5%. He may have a lower fly-ball rate this season, but he’s hitting better fly balls. Indeed, according to Baseball Savant’s batted-ball classifications—which exclude pop-ups from fly balls—Pérez is hitting a career-high 24% fly balls, which is above the MLB average of 21.9%. Houston, we have liftoff!

Raw Power

This is my favorite part of most of the articles I write. If it were as simple as a guy hitting more fly balls, I probably wouldn’t put pen to paper (or fingers to keyboard) in the first instance. But it never is.

A quick trip to one of my favorite sites for evaluating hitters, Statcast’s exit velocity and barrels leaderboard, will help us discern what Pérez is doing differently this year. His 95.7 EV on fly balls and line drives is impressive, ranking 53rd-best in all of baseball. However, as Nick Gerli astutely pointed out, line drives are basically valuable no matter the velocity with which they’re hit, whereas the value of a fly ball is highly dependent on exit velocity. Thus, removing exit velocity on line drives from the EV on FB/LD metric provides a better representation of true raw power.

Season Exit Velocity on Fly Balls MLB Rank 2016 93.8 mph 61 2017 92.1 mph 163 2018 91.0 mph 257 2019 97.9 mph 8

Isolating just Pérez’s fly-ball exit velocity shows that it’s up nearly eight ticks over last year. He hits fly balls way harder than in prior seasons. He hits them harder than nearly every other hitter in MLB. In fact, he’s only behind one other catcher: Jorge Alfaro.

Season Brls/BBE% MLB Rank 2016 6.0% 237 2017 6.6% 216 2018 5.9% 243 2019 12.7% 72

Pérez’s increase in barrel rate is dramatic too. He has more than doubled his 2018 mark. In fact, he sits fourth among all catchers, behind only Jason Castro, Mitch Garver, and Gary Sanchez. Of course, unlike the first two guys, Pérez isn’t in a timeshare.

Impressively, Pérez has not been dependent upon short pulled fly balls for his 16 homers. His pull rate according to Statcast is a meager 28%, well below the league average of 36.4%. And as I’ve noted before with respect to Jose Ramirez, pulled fly balls can be a fickle beast, depending on how a hitter is pitched.

So where is this newfound raw power coming from? Maybe you can spot it for yourself. Here’s Pérez in the 2016 World Series on the left next to a still of Pérez just before he hit a home run this season:

Besides the loss of a gratuitous amount of eye black, I spy two changes. First, Pérez is standing taller in the batter’s box. I’ve noted this before with respect to Freddie Freeman and Eugenio Suarez. For consistency’s sake, I’ll provide the same reasoning as to why this could be the cause of Pérez’s power surge:

When you’re leaning over, you fall into your swing, forcing your body to slow itself down in order to regain balance, and diminishing your bat speed.

With better balance, Pérez should be able to stay true through his swing and move through the hitting zone more quickly.

But Pérez has also lowered his hands. Now, they’re level with his front shoulder instead of his head. As former player and hitting coach Matt Stairs has discussed, the idea behind this swing change is to start lower in order to be quicker to the ball. Instead of beginning with your hands up and then bringing them down to start your swing just to bring them back up again to load, you start low and go straight to the baseball. There’s one fewer superfluous movement, which increases bat speed and shortens up the swing.

Of course, the juiced ball doesn’t hurt either. And with an emphasis on fly balls, standing taller in the box, and lowering his hands, Pérez is now able to hit for impressive opposite-field power even off good pitching:

That’s impressive stuff that we don’t typically expect from a catcher. Certainly not one with a career-high eight homers coming into the season.

Contact Ability

His contact ability, however, tells a different story. Pérez has a 30.9% whiff rate and 28.2% strikeout rate this season. Plugging his whiff rate into a regression formula derives about a 26-27% expected strikeout rate. Though he’s slightly underperforming his expected strikeout rate, given that he’s a passive hitter (37.9 Swing%), he’s likely to continue to do so by a marginal degree.

Ordinarily, I write for traditional 5×5 categories leagues. But I’d note Pérez is more valuable in OBP leagues given his .344 OBP and 11.5 BB%. This is no surprise given his excellent 22.4 chase rate. As for his batting average, it’s important to consider his Statcast batted-ball profile.

Metric Roberto Pérez MLB Average GB% 48.7% 45.5% FB% 24.0% 21.9% LD% 22.0% 25.5% PU% 5.3% 7.1% Pull% 28.0% 36.4%

This season, Pérez’s batting average is .255 and his BABIP is .295. His low pull rate makes him less susceptible to the shift, and his low pop-up rate means he’s minimizing the least valuable contact. Combined with an elevated ground-ball rate, this means he might continue to muster a decent BABIP—though I expect it’s still slightly inflated given his career-high fly-ball rate (fly balls rarely land for hits) and the BABIPs from 2017 and 2018, respectively: .266 and .257. Perhaps his new true talent is represented by a compromise .275 BABIP.

When his BABIP falls, it will be difficult for Pérez to continue besting his .242 xBA given his strikeout rate. Though he’s certainly no black hole in the category like some other catchers, he may be more like a .245 hitter than the .255 average he maintains today.

Conclusion

Right now, Pérez is on about a 60 R/30 HR/75 RBI/0 SB/.250 AVG pace. That not only plays at the position, but also would be an excellent option even in standard 12-team mixed leagues. Besides Sanchez, J.T. Realmuto, Willson Contreras, and Yasmani Grandal, there are no other catchers I’d drop Pérez to pick up. Perhaps Omar Narvaez and Christian Vazquez continue their breakouts, but I’m not sold. Pérez has nearly doubled Vazquez’s barrel rate and has more than doubled Narvaez’s, and if those guys revert to empty batting averages, then they’ll retain value in only the deepest of leagues.

Better yet, Pérez has made real changes to his approach at the plate, and the results are supported by his new career-high home run total—set only about a third of the way into the season—with excellent peripherals to boot. It’s difficult to tell how some of this season’s power breakouts will fare next year given that it feels like any of us could hit a home run these days, but I believe that, in Roberto Pérez, a fantasy star is born.

(Photo by Frank Jansky/Icon Sportswire)