I don't have faith in players that have 1 baseball skill. (power, in this case) Certainly there is a chance that he breaks the mold and can translate a lack of plate awareness but huge power into a capable starting catcher, but I don't believe it will happen. Ideally, he'd be an AL DH type that can catch periodically.
From fangraphs, both positive and negative. (in my opinion we are making a mistake thinking he's an everyday catcher)
"As with most players, there are some real red flags when looking toward 2014, but they come with some positive signs as well. Brian McCann is a free agent and there is no guarantee that the Braves resign him, but they still could. If that were the case, Gattis would once again be a back-up, and given his horrid defense in left field, it would likely take an injury to McCann to ensure Gattis receives nearly 400 plate appearances again.
Next, Gattis’ plate approach is rather poor. With a 21/81 BB/K ratio, he was impatient and struck out too often given his walk rate. His minor league strikeout rates were much better, providing some optimism, but his 12% SwStk% was well above the league average. He’ll have to cut down on his swings and misses to have any chance of improving his strikeout rate. Aside from an inability to make consistent contact, Gattis apparently enjoys going fishing. By that, I mean that he loves to swing at pitches outside the strike zone. His 42.1% O-Swing% would have ranked seventh highest in baseball if he qualified. That is going to lead to pitchers rarely throwing him a strike, hurting his chances of taking a walk and limiting his ability to drive the ball and hit for power.
Line drive rates in small samples aren’t particularly meaningful, but while I’m questioning Gattis’ plate approach, it’s worth noting that his 14.5% LD% and 44.6% FB% are additional pieces of evidence that his approach doesn’t appear to be one that leads to long term success. Of course, we have to remember that this is a 27-year-old who recently got back into baseball after many years off. So just like any older player in the minors, we need to heavily adjust his minor league numbers when projecting his future MLB potential. It’s possible that this is who Gattis is and although he has power, that’s really all he brings to the plate.
I did promise some good news and that comes from two areas. First, the power is for real. His batted ball distance ranked 43rd in baseball at 293 feet, which is very good and matches up with a 17% HR/FB ratio. Furthermore, his BABIP was just .255. His xBABIP was actually just .264, but as mentioned above, his batted ball mix was rather poor. This may certainly be his true talent level with a repeat on the way, but it also seemingly can’t get much worse. Hence, there’s a lot more upside here than downside. That means that he’s not a lock to be a batting average killer.
There are many question marks surrounding Evan Gattis heading into next season. Given his journey to the bigs and with his playing time up in the air and issues concerning his approach at the plate, he’s a difficult man to project at the moment. His possible outcomes are likely all over the map, meaning that he could turn into a top five catcher or be a complete bust. Nothing would surprise me."