What Might Mookie Betts Be?
Over the weekend, the Red Sox summoned Mookie Betts from Triple-A; he made his big league debut last night, going 1-3 with a walk. While no single game will ever reveal much about a player’s skillset, the process by which he approached the game seems to fit with his minor league profile:
He didn’t chase pitches; he swung at only two of 11 out-of-zone-pitches.
He makes contact; he put the bat on the ball on all eight in-zone swings.
According to MinorLeagueCentral, Betts only swung at 34% of the pitches he was thrown in Pawtucket, and he made contact on 88% of his swings. Minor league data isn’t as reliable as major league data, but in general, swing and contact rates are pretty easy things to track and should at least be in the ballpark. While Betts will almost certainly see more in-zone pitches and be forced to swing more often in the big leagues, he has shown a pretty disciplined eye at the plate, and we shouldn’t expect him to expand the strike zone even against big league pitching.
And swing/contact rates do tend to carry over from the minors to a decent degree. For instance, if we look at the other prospects of note who have been promoted from the International League this year, we see that their swing and contact rates in the big leagues were in the same general range as their were in Triple-A.