The hard-throwing but often wild Jefferson had his only winning season (6-5) as an Oriole rookie in 1973. The 24th pick of the Blue Jays in the 1976 expansion draft, he was an abysmal 22-56 in four years in Toronto. Jefferson’s two-hitter against the Mariners on July 27, 1980 demonstrated that he could be a brilliant pitcher at times. There were other times when he was terrible. He set a Blue Jay franchise record with nine walks in a game against Baltimore on June 18, 1977, and he allowed 10 earned runs (with four homers) against Chicago on April 11, 1978. Jefferson’s best full season came in 1977, when he went 9-17 with a 4.31 ERA.