Complex sentence: His first and only major league appearance came against the Milwaukee Brewers on Sept.17,1982, working 2 2/3 innings, but tore his rotator cuff in the process, ending his career.
Split into simpler sentences: His first and only major league appearance came against the Milwaukee Brewers on 17 September 1982. He pitched for 2⅔ innings, but tore his rotator cuff in the process, ending his career.