Yasiel Puig's power drought a big concern

Through the first two months of the season, Yasiel Puig looked like a superstar franchise player, as good -- and certainly as exciting -- as any position player in baseball. At the end of May, he was hitting .344/.436/.615 with 11 home runs, was drawing walks and making spectacular plays in the outfield. Sure, there were still some rough spots with the mistakes on the bases and some misplays in right field, but he looked like he was building upon his excellent rookie season. 

But then the home runs stopped coming. 

And lately he hasn't hit much of anything. 

Since June 1, he has two home runs in 78 games -- or one fewer than Giants pitcher Madison Bumgarner has hit on the season. Since Aug. 1, he's hitting .207 with no home runs and just three extra-base hits in 111 at-bats. The power has vanished. The Dodgers still hold a three-game lead over the Giants in the NL West as Matt Kemp and Adrian Gonzalez have provided most of the punch, but Puig's struggles are a big reason L.A.’s offense has been middle-of-the-pack since the All-Star break and just 13th in the National League in home runs in the second half. 

After Puig missed Saturday's game with a stomach virus, he was back in the lineup Sunday -- but hitting seventh, his lowest spot in the batting order in his career. "Yas is probably hitting where he should be hitting right now," Dodgers manager Don Mattingly said before the game. "I think it's a place where you're not putting extra pressure on him. Who do you want the extra at-bat going to? Right now, that's not necessarily Yasiel." 

Puig is still having a solid season overall, ranking fifth in the NL with his .382 OBP. But what has happened to the power he displayed in April and May? Let's start by looking at the pitches Puig has faced, to see if pitchers made some sort of adjustment.