Baltimore: 2B Brian Roberts played his first major league game since May 16, 2011, starting in the leadoff spot after coming off the 60-day disabled list. He had been sidelined due to post-concussion complications. IF Steve Tolleson (.237 in 12 games) was optioned to Class AAA Norfolk (Va.), and OF Nolan Reimold (neck) was transferred to the 60-day DL to clear a spot on the 40-man roster. ... LHP Brian Matusz might not make his start Wednesday after fouling a ball off his nose during a bunting drill. He was working on his bunting against a pitching machine. Matusz has four career major league plate appearances and no hits.
Boston: OF Marlon Byrd, designated for assignment Saturday, was released by the Red Sox. Acquired April 21 from the Cubs for RH reliever Michael Bowden, Byrd batted .270 (27-for-100) with one homer and seven RBI in 34 games for Boston. ... RHP Daniel Bard allowed one run in one inning out of the bullpen Monday for Class AAA Pawtucket (R.I.), but Red Sox manager Bobby Valentine said pitching in relief wasn't intended as a precursor to an impending change in role for Bard. Bard was demoted June 5, and he made a one-inning start Friday, allowing three runs.
Chicago: LHP John Danks allowed three runs (one earned) on four hits in four innings Tuesday in a rehab start for Class AAA Charlotte (Fort Mill, S.C.). Danks, out since May 20 due to soreness in the back of his left shoulder, might make one more rehab start before rejoining the White Sox. ... Manager Robin Ventura hinted that RHP Philip Humber needs to turn things around or he would be headed for a bullpen demotion, but Humber will get at least one more chance to rebound. Humber will start Saturday at Dodger Stadium. He is 1-4 with a 7.50 ERA in nine starts since his April 21 perfect game at Seattle.
Cleveland: RH reliever Esmil Rogers, designated for assignment by the Rockies on Saturday, was acquired by the Indians in a cash transaction. Rogers was 0-2 with an 8.06 ERA in 23 appearances for Colorado this season. He wasn't immediately added to the 25-man roster, but Class AAA Columbus (Ohio) C Luke Carlin was designated for assignment to clear room for him on the 40-man roster. ... 3B Jack Hannahan began a rehab assignment Monday with Columbus, going 0-for-4 with two strikeouts as the designated hitter. Hannahan has been out since May 27 due to a strained left calf.
Detroit: RH reliever Octavio Dotel, who hasn't pitched since June 2 because of right elbow inflammation, was placed on the disabled list. RH reliever Luke Putkonen was recalled from Class AAA Toledo (Ohio), where he was 2-2 with a 3.32 ERA in 11 appearances. Putkonen went 0-2 with an 8.59 ERA in six games with Detroit earlier this season. ... SS Jhonny Peralta was activated off the paternity list after missing two games to attend the birth of his twin daughters. IF Hernan Perez was optioned to Toledo after going 1-for-2 in his first two major league games.
Kansas City: 2B Chris Getz was activated off the disabled list and inserted into the starting lineup, batting second. Getz had been out since May 22 with a bruised left ribcage. 2B Johnny Giavotella, who hit .217 with three doubles and six RBI in 21 games, was optioned to Class AAA Omaha (Papillion, Neb.). ... LH reliever Everett Teaford blew a save but picked up a victory Monday in his second rehab appearance for Omaha. Teaford allowed one run on four hits in three innings, throwing 30 strikes in 54 pitches. Teaford went on the disabled list May 19 with a lower abdominal strain.
Los Angeles: RHP Jered Weaver threw 30 pitches halfway up the slope of the mound Monday, and he was tentatively scheduled to throw a simulated game this weekend. Weaver has had no recurrence of the back pain that landed him on the disabled list May 29, and he could be ready to rejoin the rotation next week. ... C Chris Iannetta (fractured right wrist) had the start of his rehab assignment pushed back a second time due to soreness in his right forearm. Iannetta could start playing for high-A Inland Empire (San Bernardino, Calif.) in the next few days, manager Mike Scioscia said.
Minnesota: Since being recalled from Class AAA Rochester (N.Y.) on May 7, LHP Scott Diamond has emerged as the Twins' ace. He is 5-1 with a 1.61 ERA through seven starts. "He went down (to the minors) and pitched his tail off down there, and when he's come up here, he's carried it right through here. That's a good story," manager Ron Gardenhire said. ... OF Byron Buxton, the second overall pick in last week's draft, took batting practice with the Twins. He took a physical and was close to finalizing a contract agreement. Buxton, 18, hit .513 for Appling County (Ga.) High School this season.
New York: RH closer Mariano Rivera underwent season-ending surgery to repair the torn anterior cruciate ligament in his right knee, but nothing was done to his meniscus. Rivera said last month that he had torn the meniscus when he sustained his ACL tear, but it appears that was not the case. Rivera is expected to pitch sometime in 2013. ... LF Brett Gardner visited James Andrews, though he declined to say what the orthopedist found in his strained right elbow. Gardner will get another opinion from orthopedist Timothy Kremchek in Cincinnati on Thursday, after which the Yankees will give an update on his status. Gardner said he fully expects to play again this season.
Oakland: RHP Graham Godfrey, who opened the season in the major league rotation, didn't pitch well for the A's, but he's been stellar in Class AAA. He went 0-4 with a 6.43 ERA in five games (four starts) over two stints with Oakland, but he's 5-0 with a 1.05 ERA in eight starts for Sacramento (West Sacramento, Calif.). ... OF Yoenis Cespedes was out of the starting lineup for the fourth consecutive game due to a strained left hamstring. Entering the series opener at Colorado, the A's were 19-16 with Cespedes starting, 7-19 without him.
Seattle: Manager Eric Wedge had said he was considering moving RH reliever Brandon League back into the closer role, but that was before League struggled Sunday, allowing four hits and two runs in one inning. "We'll continue to evaluate, continue to recognize what we need to see before we do anything else," Wedge said. ... The Mariners have used only five starting pitchers all season, a fact that remained intact when RHP Felix Hernandez pitched the opener against San Diego. Hernandez had missed a start due to a sore back.
Tampa Bay: Hideki Matsui, who hadn't started any of the previous four games, was in the lineup as the designated hitter on his 38th birthday. "I would be absolutely vilified in Tokyo if I did not play him today," manager Joe Maddon said. ... 2B Ben Zobrist, who has been dealing with a sore hand, was out of the starting lineup. X-rays were negative, and Zobrist is day-to-day. Will Rhymes played third base, with Sean Rodriguez moving to second.
Texas: RHP Alexi Ogando, hurt while beating out a bunt single in a spot start Sunday, is likely to miss four to six weeks with a strained right groin. He was due to get a blood-platelet injection to speed the healing process. ... LHP Michael Kirkman was recalled, and he might join the rotation after going 5-1 with a 5.25 ERA in 15 games (eight starts) for Class AAA Round Rock (Texas). It's uncertain how soon recently signed RHP Roy Oswalt would be ready to join the major league rotation. Oswalt made his third minor league start Tuesday, pitching for Class AA Frisco (Texas).
Toronto: DH Vladimir Guerrero, 37, asked for and received his release from his minor league contract. Guerrero felt he was ready for the majors after hitting a combined .358 (19-for-53) in four games for high-A Dunedin (Fla.) and eight for Class AAA Las Vegas, but the Blue Jays felt he needed more time. GM Alex Anthopoulos said there was a handshake agreement that Guerrero could leave at any time after signing on May 10. ... RHP Brandon Morrow was undergoing tests on his strained left side muscle, and he was likely to go the disabled list, Anthopoulos said. Morrow left in his Monday start after nine pitches. ... RH reliever Chad Beck, who pitched 3 2/3 innings Monday in relief of Morrow, was optioned to Las Vegas. LHP Aaron Laffey and LH reliever Evan Crawford were recalled from the Class AAA club, and IF/C Yan Gomes was demoted to Las Vegas. Gomes hit his third big-league homer Monday, and he was batting .226 (7-for-31).