Johnson, Schilling, Schmidt, Burnett have injury worries

Schmidt, who signed a $47 million, three-year contract, went on the disabled list in April with bursitis in his shoulder after going 1-2 with a 7.36 ERA in three starts.

Following a 45-game absence, Schmidt returned June 5 and threw six shutout innings in San Diego, consistently reaching 89 mph and topping out at 91 mph. But the 34-year-old right-hander didn't perform nearly as well in his last two starts, and his velocity was down. He is 1-4 with a 6.31 ERA.

Burnett, 5-6 with a 4.00 ERA in 14 starts this season, left his last start in San Francisco on June 12 because of pain in his shoulder. He felt pain again during a throwing session Sunday but was still able to play catch with pitching coach Brad Arnsberg before Tuesday's game against Los Angeles.

The move was retroactive to June 13. The Blue Jays hope Burnett will be ready to start at Minnesota on June 28, the day he's eligible to return.

General manager J.P. Ricciardi said Burnett could have made his scheduled start against Colorado on Saturday, but the team decided to "err on the said of caution."

The 30-year-old Burnett signed a $55 million, five-year contract with Toronto before the 2006 season, then went 10-8 with a 3.98 ERA in 21 starts. He started the 2006 season on the DL because of scar tissue in his right elbow from a previous operation and made just two starts before going back on the DL for two months, returning June 22.