NOT REALLY MISSING IN ACTION- 1977 KEN CROSBY

Here’s a “not so missing” 1977 card for former Chicago Cubs pitcher Ken Crosby, who appeared in what turned out to be the final MLB games of his brief two-year career during the 1976 season:

Crosby appeared in seven games, not factoring in a decision while posting a 12.00 earned run average over 12 innings pitched.
The previous season he appeared in nine games, going 1-0 while posting an ERA of 3.24 over 8.1 innings, striking out six while walking seven.
I couldn’t find any more information on his career being that it seems he never pitched in any level of Pro Bal after those last MLB games of 1976.
Anyone know what happened?