BOSTON -- Troy Glaus is prepping for one last trial run. On Wednesday, the third baseman will join the Blue Jays in New York, where he'll test his sore left foot during batting practice and fielding drills at Yankee Stadium.

If everything goes well, Toronto will be able to activate Glaus from the 15-day disabled list and insert him back into the heart of the order for Saturday's home game against Texas. Glaus has been out with a bone spur in his left heel since April 12.

"He should be able to play on Saturday," said Blue Jays general manager J.P. Ricciardi, who was in attendance for Toronto's game against Boston on Tuesday at Fenway Park.

Ricciardi added that the heel injury first became an issue earlier this season. Toronto's GM said that Glaus had always worn shoes that were a half-size too small. When Glaus, who led Toronto with 38 home runs in 2006, began having some discomfort in his foot, it was suggested that he wear larger shoes. The change eventually led to pain in his heel.

"He went to a size bigger," Ricciardi said. "That's how he got the heel [problem]. His toe was bothering with a smaller shoe and someone told him in Spring Training to go up a size."

The discomfort forced the 30-year-old Glaus to leave games prematurely on April 7 and April 12. After the second occurance, Toronto rested Glaus for a few days before opting to place him on the DL. For the year, Glaus is hitting .333 with two home runs and five RBIs in eight games for the Jays.

Toronto manager John Gibbons indicated that Glaus didn't have any problems with his heel last season, when the third baseman played through other leg issues. Ricciardi also said that the bone spur in Glaus' heel can't be removed with surgery. It's something that he'll probably have to deal with throughout the remainder of the year.

"It's just something that came up," Gibbons said. "I'm sure it's going to flare up on and off."

Rehabbing: Right-hander John Thomson, who is on the 15-day DL with tendinitis in his right shoulder, made his first rehabilitation start for the Blue Jays on Monday. Thomson logged four innings and allowed four runs on eight hits with six strikeouts and one walk for Class A Dunedin.

"I talked to [Jays director of player development] Dick Scott and he said the line wasn't indicative of how he pitched," Ricciardi said. "He's going to go on rehab assignments, and we'll see how he progresses from there."

Ricciardi said that Thomson, who signed a one-year deal with the Jays in January, will likely remain with Dunedin for a couple more outings before moving up to Double-A New Hampshire. Thomson will make six or seven appearances there before Toronto will determine what its plans are for the right-hander.

Ryan reaction: As far as the Blue Jays are concerned, transferring All-Star B.J. Ryan from the 15-day DL to the 60-day DL on Monday didn't alter the timetable for the closer's return. Ryan, who has been out with a strained ligament in his left elbow since April 15, wasn't going to play catch for four weeks, and Toronto felt it'd probably take another month for him to return at full strength.

"When he got back from [seeing Dr. James Andrews in] Alabama," Gibbons explained, "they said, 'Don't touch a ball for a month.' Then he's going to start a throwing program. The guy's going to be out, you've got to figure, two months anyway."

Taming Boston: Red Sox sluggers David Ortiz and Manny Ramirez combined to go 0-for-6 against Toronto right-hander Tomo Ohka on Monday night. For the season, that duo has gone 1-for-11 at the plate against Ohka, who downplayed the success he's had against Ortiz and Ramirez in his two starts vs. Boston.

"It's just two games," Ohka said on Monday. "We'll face those guys a lot this season. Next time, I don't know [what will happen]. Those guys are great hitters, and they can adjust."

The countdown: On Tuesday, Toronto designated hitter Frank Thomas entered the game 10 home runs shy of 500 for his career. The Big Hurt also needed three more blasts to tie Lou Gehrig and Fred McGriff for 21st all-time. Six more homers and Thomas will surpass Edgar Martinez (243) for the most in baseball history by a DH.

Did you know? Jays second baseman Aaron Hill belted his fourth home run of the season on Monday. He didn't reach four home runs until Toronto's 147th games in 2006.

Quotable: "It's amazing what a win will do for you emotion wise. You always sleep a little better. I manage to sleep good anyway. That's never been a problem." -- Gibbons

Coming up: Toronto right-hander A.J. Burnett (1-1, 5.57 ERA) is slated to take the mound on Wednesday at 7:05 p.m. ET in the opener of a two-game set against New York at Yankee Stadium. The Yankees will counter with left-hander Andy Pettitte (1-0, 1.78 ERA).