Complex sentence: He pitched just 37.2 innings in A-ball in 1990, spent 1991 at AA Huntsville, and was the hurt for much of 1992 at AAA Tacoma before splitting time between Oakland and Tacoma in 1993.
Split into simpler sentences: He pitched just 37.2 innings in A-ball in 1990, before spending 1991 at AA Huntsville. He was hurt for much of 1992 at AAA Tacoma before splitting time between Oakland and Tacoma in 1993.