Baseball-Major League Baseball roundup

May 8 (The Sports Xchange) - Just when the Cincinnati Reds' rotation was beginning to get healthy, it took another hit when left-hander John Lamb left his start against the Milwaukee Brewers on Sunday with a sprained left thumb. Lamb had allowed a run and only two hits through four innings when he was visited by trainers. The injury is not related to his offseason back surgery, which resulted in Lamb beginning the season on the disabled list. He was making his second start since being activated. - - - The Reds recalled outfielder Kyle Waldrop from Triple-A Louisville. Waldrop hit .228 with four home runs and 11 RBIs in 26 games with Louisville. Waldrop replaces outfielder Scott Schebler, who was optioned to Louisville following Saturday's loss to the Milwaukee Brewers. - - - The Oakland Athletics demoted right-hander Jesse Hahn to Triple-A Nashville, one day after he struggled through a start against the Baltimore Orioles. Right-handed reliever J.B. Wendelken was recalled from the same club to replace Hahn. - - - New York Mets pitcher Bartolo Colon became the oldest player in MLB history to hit his first career home run, blasting a two-run shot in the second inning of Saturday night's game against the San Diego Padres. Colon, 42, sent a 1-1 pitch from Padres starting pitcher James Shields into the left field bleachers in his 226th career at-bat. All of Colon's three career extra-base hits have come in his three seasons with the Mets. Randy Johnson previously held the title of oldest player to hit his first home run, doing so at age 40 on Sept. 19, 2003, as a member of the Arizona Diamondbacks. - - - The Texas Rangers placed right-hander A.J. Griffin on the disabled list with right shoulder soreness and recalled left-hander Alex Claudio, just optioned to Triple-A Round Rock. - - - The Chicago White Sox will promote right-hander Miguel Gonzalez from Triple-A Charlotte to start Monday against Texas, manager Robin Ventura said. Gonzalez, 31, allowed five earned runs in 5 1/3 innings in his only other start of the season April 25 against Toronto. - - - Los Angeles Dodgers right-hander Mike Bolsinger (left oblique strain) started a rehabilitation assignment with Oklahoma City on Saturday. - - - The San Diego Padres placed second baseman Jemile Weeks on the 15-day disabled list with a hamstring strain suffered Saturday night while running to first on a seventh-inning bunt. Infielder/outfielder Jose Pirela flew in from Triple-A El Paso Sunday morning to take Weeks' spot on the 25-man roster. (Editing by Andrew Both)