Matt Duffy hit 16% above average last season, with a .295/.334/.428 slash line in 612 plate appearances as a 4.9 fWAR third baseman. He finished second in Rookie of the Year voting to Kris Bryant.
This year, in 286 plate appearances before going on the disabled list with an Achilles strain, Duffy hit 12% below average for the Giants, with a .253/.313/.358 slash line.
When he hit well, his BABIP was a high-but-not-ridiculous .336, and when he hit poorly, his BABIP was a low-but-not-ridiculous .282. But while both the Steamer and ZiPS projection systems think he’ll be around league average, they’re not working off a ton of data.