Colorado Rockies first baseman Todd Helton will undergo season-ending surgery to his shoulder and hip this week.
The surgery, which will repair a torn right labrum and damage in his hip, will take place on Friday, 10 days before his 39th birthday.
Helton was on the 15-day disabled list after the All-Star break, and he has played six games since then.
The 2013 season will be the final year of his contract and he will earn $5 million.
Helton is batting .238 with seven homers and 37 RBIs. His previous lowest batting average for a season was .256 in 2010.
He played in 69 games in 2012, the fewest since he played 35 while breaking in with the club in 1997.
Helton's injury issue is the latest bit of bad luck for the Rockies, who are on pace for their worst season in history.
---Rays third baseman Evan Longoria made his eighth minor league rehab start on Sunday and the team announced he'll rejoin the 25-man roster Tuesday for the start of a series with the Blue Jays.
Longoria has been out since April 30 with a partially torn left hamstring. All his rehab appearances have been as a designated hitter, and he likely to remain a designated hitter for a while after he returns to the Rays.
Longoria is batting .329 with four homers for the Rays this season.
To clear a roster spot, the Rays optioned infielder Will Rhymes to Durham.
--The Indians claimed right-handed pitcher Fabio Martinez off outright waivers from the Angels and optioned him to Class-A Carolina.
Martinez, 22, missed all of last season with arm problems and had a 10.72 ERA in eight starts this season with the Angels' Class-A Inland Empire of the California League.
He was 8-3 with a 3.92 ERA -- including 141 strikeouts in 103 1/3 innings -- in 2010.
--The Washington Nationals claimed infielder Cesar Izturis off waivers from the Milwaukee Brewers on Monday.
Izturis, who has seen time at all four infield positions this season, was claimed by the Nationals, who needed depth around the infield with shortstop Ian Desmond on the disabled list and Mark DeRosa (groin) day-to-day.
Izturis is batting .235 this season. The Brewers did not receive compensation in the transaction, which is officially recorded as a waiver claim by Major League Baseball.
--The Giants claimed left-handed reliever Jose Mijares from the Kansas City Royals on Monday.
Mijares, 27, is 2-2 with a 2.56 ERA in 51 relief appearances. He's under team control until 2014 and has a career ERA of 3.04 in five seasons. He spent the previous four seasons with the Minnesota Twins.
--Roy Oswalt, who taken out ofTexas' starting rotation recently, pitched two perfect innings in relief Sunday in the Rangers' 7-6 10-inning loss to Kansas City and needed only 30 pitches to do so. But then he told manager Ron Washington he couldn't go any longer, leaving the manager perplexed.
"He said he couldn't go any further," Washington said. "He said he had enough. To get anymore, you have to ask him."
Washington was ready to send Oswalt back out for the ninth inning of what was then a tie game, but Oswalt declined.
--The Blue Jays designated right-handed pitcher Jesse Chavez for assignment.
Chavez was recalled Saturday and pitched one scoreless inning against the Athletics.
Chavez, 28, had an 8.44 ERA in 21 1/3 innings with the Blue Jays this season and was mostly a starter at Triple-A Las Vegas.