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04/10/11 5:15 PM ET

Patterson activated; Richmond optioned

ANAHEIM -- The Blue Jays activated veteran outfielder Corey Patterson from the 15-day disabled list following Sunday afternoon's game against the Angels.

Patterson had been out since the final week of Spring Training, after getting hit in the head by a fastball from Boston's Daniel Bard.

The 31-year-old Patterson is expected to join the Blue Jays in Seattle on Monday for the start of their three-game series against the Mariners.

To make room on the 25-man active roster, Toronto optioned right-hander Scott Richmond to Triple-A Las Vegas.

Richmond's first stint with the Blue Jays this season didn't last very long. He joined the team on Sunday morning, when utilityman Mike McCoy was optioned to the Minor Leagues.

Richmond was called up just for one game to provide emergency depth to an undermanned bullpen, following Saturday night's 14-inning game. Toronto's bullpen used six relievers, who threw a combined 8 2/3 innings in that game.

Thanks in part to an impressive performance by starting pitcher Jo-Jo Reyes, Toronto didn't need to get much out of Richmond. He retired the only batter he faced in the bottom of the eighth inning.

"As much as our bullpen has been pressed into duty -- and 14 innings last night, quick turnaround -- Scott is someone that we can budget for 70 pitches today, if needed," Blue Jays manager John Farrell said before Sunday's series finale against the Angels.

Patterson is expected to take over starting duties in center field for the next few days, after Rajai Davis re-aggravated his right ankle injury.

The native of Atlanta has hit .253, with 112 home runs and 205 stolen bases, during his 11-year career.

Encarnacion sits out due to hip issue

ANAHEIM -- Edwin Encarnacion was held out of the Blue Jays' starting lineup on Sunday afternoon because of a strain to his right hip flexor.

Encarnacion suffered the injury while running to first base during the 13th inning of Saturday night's loss to the Angels.

"He didn't feel that popping sensation, so he would be available for limited action," Blue Jays manager John Farrell said. "But we don't foresee this being something that's going to keep him off the field for any length of time."

Encarnacion came under fire during the 11th inning of Toronto's 6-5 loss on Saturday. He fielded a routine ground ball at third base, but his throw to first sailed away from Adam Lind.

It was the fourth error in as many games for the 28-year-old third baseman. Despite the defensive woes, Farrell said he intends to stick with Encarnacion on the hot corner.

"The one thing that Edwin knows is that we have a lot of support for him, and we're going to continue putting him in there," Farrell said. "We feel like his bat is going to be an offensive weapon for us, and we have to continue to find ways to get him on the field."

Farrell also doesn't believe that Encarnacion is having any mental issues at third. He thinks it's more of a mechanical issue.

"I think there are times his arm slot will drop and cause that ball to run up the line, as was the case last night," Farrell said. "More than anything, if Edwin continues to get his feet in the proper position and his body moving in the right direction, it should let that throw stay true."

Encarnacion is hitting .167 (5-for-30) with one double and three RBIs this season. Last year, he posted 21 home runs with 51 RBIs.

Farrell intends to keep Rivera in lineup

ANAHEIM -- Blue Jays manager John Farrell said he intends to continue putting Juan Rivera in the lineup, despite his early-season struggles.

Rivera is batting just .154 (4-for-24) and has yet to record an extra-base hit. The lack of power production has been somewhat concerning for a player who hit a combined 40 home runs over the past two seasons.

"It's still a timing thing," Farrell said. "You see contact being made, yet you don't see him driving the ball like he's capable [of doing].

"We're committed to him, we're going to keep putting him in there."

Farrell thinks part of the issue might be related to Rivera's new role with the Blue Jays. Rivera is being used primarily as a designated hitter for the first time in his career, and that could lead to a period of adjustment.

"I know right now he's going through a bit of a thing where he's not accustomed to DH-ing," Farrell said.

"That is a role that is not easy for a player or position player that normally has been an everyday guy, where he's dealing with both ends of the game ... So there is a little bit of an adjustment that he is going through with that."

Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.