1984 was his first full major league season; he finished the year with a .264 batting average, 116 hits, and seven home runs.

While his statistics only improved slightly over 1985 (his average went up to .288 and 168 hits, with fewer home runs and RBI - and more strike outs), he earned his first All-Star Game appearance.

1989 would show a small improvement over the prior year, as he raised his average to .272 and increased his offensive production.

He suffered from an elbow injury, and in the middle of the year was traded to the Oakland Athletics for Lee Tinsley.

[3] Prior to working with the Jays, Jacoby served as the major league hitting coach for the Cincinnati Reds for seven seasons.

On May 4, 2015, MLB announced that Jacoby had been suspended for 14 days without pay due to his conduct toward the umpiring crew on April 29, after a game against the Boston Red Sox.