Mariners utility infielder Jack Hannahan had an MRI that revealed a mild strain of his right groin, and manager Don Wakamatsu said he’d be shut down for 7-10 days.

Wakamatsu said Hannahan suffered the injury against the Padres on March 4, and he hasn’t played since.

“We’re looking at least 7-10 (days) right now,” Wakamatsu said. “It’s better than we thought, but we’re going to shut him down for three days of nothing, and then progress. It’s not where it’s pulled off the bone. It’s more in the belly of the muscle. That means it’s not something that’s violent. It’s more of an over-stretch deal.”

The injury could alter the competition for the opening-day backup infield job. Hannahan has played third base most of his career, but the Mariners planned to give him considerable work in the middle of the infield, particularly shortstop, in this camp. The player with the inside track on that now is Josh Wilson, who played 32 games last year at shortstop, five at third and four at second.

Other notes from this morning as the team headed outside for its pregame work:

The dynamic duo of Ichiro Suzuki and Chone Figgins is back at the top of the Mariners’ lineup today against the Royals. Figgins doesn’t have a hit, yet he has walked seven times in 16 plate appearances, has scored four runs and has a .438 on-base percentage. As a team, the Mariners have a .358 on-base percentage so far (it was .314 for the regular season last year after they’d posted a .361 on-base percentage at spring training).

Felix Hernandez will pitch in the bullpen this morning, his last tuneup before he pitches Sunday against the Rockies in Tucson

Former Mariners catcher Dan Wilson, in camp for a few days to work with the minor leaguers, has moved his family back to the Northwest. A former goalie, he’s not playing hockey anymore as he did earlier in retirement, although he did play in a Seattle Thunderbirds charity game recently.

And now, today’s lineups:

MARINERS

Ichiro Suzuki, right field

Chone Figgins, second base

Milton Bradley, left field

Ken Griffey Jr., DH

Ryan Garko, first base

Franklin Gutierrez, center field

Matt Tuiasosopo, third base

Josh Bard, catcher

Jack Wilson, shortstop

Left-hander Ryan Rowland-Smith, starting pitcher

ROYALS

Scott Podsednik, center field

Jason Kendall, catcher

Davied DeJesus, left field

Jose Guillen, right field

Rick Ankiel, DH

Alberto Callaspo, third base

Josh Fields, first base

Yuniesky Betancourt, shortstop

Mike Aviles, second base

Right-hander Luke Hochevar, starting pitcher