The Blue Jays are planning a major shakeup with manager John Gibbons expected to be replaced by former manager Cito Gaston, SI.com has learned. Most of the coaching staff is expected to be let go as well.

The Blue Jays had been expected to contend for their first postseason appearance since 1993, when Gaston managed them to their second straight World Series title. Instead, they have struggled, going 35-39 and are in last place in the AL East, 10.5 games behind the first-place Red Sox.

Gibbons is in his fifth year as Toronto's manager and has a 305-305 record. Gaston managed the Blue Jays from 1989-1997, leading the team to four American League East titles and back-to-back World Series crowns in 1992 and 1993. He has not managed since leaving Toronto.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.