Via Kevin Goldstein, the Yankees have signed Preston Mattingly, Don’s son. The Dodgers gave him a $1M bonus as the 31st overall selection in the 2006, and he’s since gone on to hit .232/.276/.335 with 520 strikeouts and 99 walks in 1,846 minor league plate appearances. He’s never played above Single-A and had to move from shortstop to second base to left field to first base. We’re talking a total non-prospect here, but sheesh, can you believe Donnie Baseball’s kid is already 24? Preston’s not even his oldest.