That is actually a reference to the underrated Mark Belanger, who has the second highest dWAR ever behind Ozzie Smith, and a few percentage points ahead of teammate Brooks Robinson: https://www.baseball-reference.com/players/b/belanma01.shtml

that he has a .228 lifetime batting average makes him more endearing, although shortstops couldn't really hit then

also i thought there was an LBA before an LBAC, but the more important thing is literacy regarding the entire concept