LEADING OFF: Harbaugh set to coach Tigers, Chapman eligible

A look at the highlights of what's happening all around spring training in Florida and Arizona today:

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COACH `EM UP!

Michigan football coach Jim Harbaugh steps out of his khakis and into a new field when he briefly becomes Detroit's first base coach vs. Pittsburgh. He's also throwing out the first ball and might even coach for the other side - manager Clint Hurdle is from Michigan.

''If you're going to do both teams, I'd have to learn both signals. I would take that very seriously,'' Harbaugh said. ''Coaching a big league game.''

Harbaugh was already near the Pirates' camp in Bradenton, Florida. That's where the Wolverines are holding practice this week at the IMG Academy.

CHAPMAN'S STATUS

Aroldis Chapman can pitch when the Yankees start their spring schedule against a Tigers split squad. New York's new closer has agreed to accept a 30-game suspension under Major League Baseball's domestic violence policy, resulting from an incident with his girlfriend last October.

The hardest thrower in the majors is eligible throughout the exhibition season. His penalty starts on April 4 when the Yankees host Houston on opening day.

DUGOUT DEBUTS

Dusty Baker, Scott Servais and Andy Green manage their new teams for the first time. Baker guides Washington when it plays Tampa Bay; Servais and the Mariners take on Green and the Padres at the complex the teams share in Peoria, Arizona.

STRAIGHT FROM SEOUL

South Korean slugger Byung Ho Park is scheduled to play his first spring training game with the Twins against the Red Sox, likely as the designated hitter. Park hit 53 home runs in his final year with Seoul-based Nexen in the hitter-friendly Korean Baseball Organization, then signed a four-year, $12 million deal with Minnesota this offseason. The 29-year-old said he's acclimating well to life in America and has already developed a taste for the local cuisine, eating lots of steak and ribs. He's getting around OK, too. ''This is a lot easier than driving in Korea,'' he said. ''No problem.''

FRESH BATTERIES

Jeff Samardzija starts the spring opener for the Giants vs. the Angels, his first game since signing a $90 million, five-year deal as a free agent. Buster Posey will catch, giving him extra time to work with the San Francisco newcomer. Between 2014 and 2015, Samardzija's ERA jumped nearly two runs to 4.96, but San Francisco is gambling on a bounceback with hopes that he and fellow free agent acquisition Johnny Cueto can back ace Madison Bumgarner in the rotation.

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