 Called up by the Giants at the end of the season, he pitched in one game for them in 1969, then in 31 more from June 5, 1970, through the end of the season — all in relief.Overall, Davison allowed 48 hits and 22 bases on balls in 38 MLB innings pitched, with 23 strikeouts, three victories and one save.After retiring, Davison was active as a member of the Major League Baseball Players Alumni Association.