Johnson, 33, has hit .237/.338/.412 in parts of seven seasons in the majors. He’s never really been a regular player though only playing in at least 100 games twice. He’s a decent defensive first baseman, but his experience in left field or third base is limited. He’s a left handed hitter, but he has no significant lefty/righty splits.
The Yankees really don’t have a DH yet so Johnson is it. He’s certainly not the best option at the position, but they could do worse. At least Johnson shows plenty of patience at the plate and occasional pop. Expect the Yankees to make one or two more similar signings like this to compete with Johnson for time at DH. The Yankees may avoid bigger name DH, who may likewise avoid them, since Alex Rodriguez is expected by in July and will get the bulk of the DH at bats after that.
Johnson is probably most famous for his homer on Game 162 against the Yankees back in 2011. He’s always done very well against the Yankees with a .304/.370/.826 line in just 27 plate appearances. That’s an incredibly small sample size so don’t read too much into it, although Johnson is a dead pull hitter which could play well in Yankee Stadium.