PITTSBURGH — John Gibbons was fired today by the last-place Toronto Blue Jays and replaced by Cito Gaston, who led the team to World Series titles in 1992 and 1993.

The Blue Jays began the day 35-39, having lost five straight and 13 of their last 17 games to fall 10› games behind the first-place Boston Red Sox in the AL East.

He is the third major league manager to be fired this week, following Willie Randolph of the New York Mets and John McLaren of the Seattle Mariners. Randolph was fired early Tuesday morning and McLaren was dismissed Thursday.

This is the first time there were three managerial changes in a four-day span within a season since May 1991, according to the Elias Sports Bureau. Back then, Jim Essian replaced the Chicago Cubs' Don Zimmer, Johnny Oates took over from Baltimore's Frank Robinson and Hal McRae succeeded the Kansas City Royals' John Wathan.

"The team just wasn't doing what was expected of it, and maybe changes were needed," Gibbons said in a conference call. "There was a lot expected this year, we came in riding high and speaking high. And that's not the results we're getting now."

Gibbons, who became manager midway through the 2004 season, had a record of 305-305 with the Blue Jays. His best season was in 2006, when the Blue Jays went 87-75 to finish second in the AL East.

But that 2006 season was also when Gibbons challenged Shea Hillenbrand to a fight after the infielder wrote on a clubhouse bulletin board that the "ship is sinking," and a month later had a physical altercation with pitcher Ted Lilly in a dugout tunnel following an argument on the mound.

The Jays, who were in Pittsburgh to open a weekend series against the Pirates, also fired three of Gibbons' coaches — Marty Pevey, Ernie Whitt and Gary Denbo.

The 64-year-old Gaston becomes the Blue Jays' first two-time manager. He previously managed the team from 1989 to 1997.

Gaston, who has been special assistant to the president and CEO, had a 681-635 record as manager during his earlier stint. Joining his staff will be first base coach Dwayne Murphy, third base coach Nick Leyva and hitting coach Gene Tenace.

The Blue Jays' main problem this season has been hitting, and a pitching staff unable to carry the burden. Toronto is near the bottom of the AL with a .258 average and next-to-last in the league with 49 homers in 74 games.

"We tried different things, different batting orders, to see if something clicked, and there just wasn't any real consistency," Gibbons said. "We had our ups and downs, the problem is it was more downs this year."