The Detroit Tigers placed lefthander Dontrelle Willis on the 15-day disabled list with an anxiety disorder yesterday and put oft-injured reliever Joel Zumaya on the list with a sore right shoulder.

But Willis, a former ace with the Florida Marlins, said he has been feeling well on and off the mound.

"I have no idea, but [the doctors] didn't like what they saw in the blood," Willis said.

"This is not something where I'm too amped up and I don't know where I'm at, and I'm running sprints up and down the parking lot."

General manager Dave Dombrowski said he could not provide details about Willis' medical condition or treatment because of privacy regulations.

Yankees. Brett Gardner has won the starting center-field job, New York manager Joe Girardi announced.

Gardner beat out Melky Cabrera, the incumbent, for the starting spot on opening day.

"Right now, I think Gardie has a little bit of the edge," Girardi said. "He brings a little more speed to the lineup."

Gardner had a .228 batting average in 42 games in 2008.

Cubs. Manager Lou Piniella named Kevin Gregg the team's closer heading into the regular season.

Gregg beat out Carlos Marmol, the Cubs' top setup man last year. They both spent spring training vying to replace all-star closer Kerry Wood, who signed with Cleveland during the off-season.

The Cubs obtained the 30-year-old Gregg in a trade with Florida. Last season, he saved 29 games for the Marlins. The righthander also had 32 saves in 2007.

Marmol returns to his role of setup man.

The Cubs also sent former Phillies reserve So Taguchi to their minor-league camp.

Giants. Randy Johnson thinks he's ready for the regular season despite some down time this spring. The Big Unit, preparing for his first season with San Francisco, threw 80 pitches in a minor-league camp game in Scottsdale, giving up seven hits and two runs in his final Arizona appearance.

The 45-year-old lefty is 295-160 in his 21-year major-league career. He is trying to become the 24th pitcher in big-league history to reach 300 wins.

Mariners. Brandon Morrow confirmed what Seattle manager Don Wakamatsu announced earlier - that the righthander will head back to the bullpen for the start of the season.

Morrow missed much of spring training with forearm stiffness. He said the move was determined a week ago, adding that he "feels at home" in the bullpen and doesn't envision returning to a starting role.

In another move, the Mariners acquired utility player Chris Burke from the San Diego Padres for cash.

Rays. Outfielder B.J. Upton, recovering from shoulder surgery, is expected to be the designated hitter in a minor-league game today.