Barajas, 33, first tweaked his hamstring while running the bases on the road against Chicago on Sept. 11 and he aggravated the injury on the basepaths against on Saturday in Boston. On Thursday, Curtis Thigpen was behind the plate in place of Barajas for the Blue Jays.
"There's a chance that he probably won't be able to play for the rest of this year," said Blue Jays manager Cito Gaston, referring to Barajas. "But he's still going to work out and we'll see what happens with him."
Barajas, who signed a one-year contract this past offseason, claimed the starting job behind the plate over veteran Gregg Zaun this season. The Blue Jays plan on picking up the $2.5 million 2009 club option to retain Barajas, who has hit .249 with 11 home runs and 49 RBIs in 104 games for Toronto this year.
Jordan Bastian is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.