He was somewhat error-prone behind the plate during sporadic playing time at the major league level, committing 20 errors in just 136 games for a .970 fielding percentage. He also had trouble at the plate, with a lifetime batting average of just .176 with 3 home runs and 21 RBIs in 313 career at bats.
After his playing career, he eventually found his way back to the White Sox as the bullpen coach, where he served for 19 years (1980–87, 1997–2007). In between, from 1988 to 1995, he held the same position with the Oakland Athletics.[2] He was a longtime member of Tony La Russa's coaching staffs in both cities. Kusnyer stepped away from coaching full time in 2007 when his failing eyesight became too much of an obstacle. Between August 2007 and April 2008, he underwent eight surgeries to attempt to restore his vision.[3] In 2008-2009, he was listed as a roving minor league instructor by the White Sox.[4][5]
