Five days after securing a 19-inning victory over the Angels, the A’s placed their third player on the disabled list who sustained injuries from that very game.

The Dodgers’ injury epidemic reclaimed shortstop Hanley Ramirez Friday night, and the left-on-base epidemic continued, too, as they stranded 13 more and lost the series opener to the Giants on Buster Posey’s walk-off homer leading off the bottom of the ninth, 2-1.

Buster Posey hit a home run leading off the bottom of the ninth inning to give the San Francisco Giants a 2-1 victory over the Los Angeles Dodgers on Friday night.

An RBI single from Evan Longoria and a two-run homer from Kelly Johnson gave the Rays a 7-4 extra-inning victory over the Rockies on Friday night.

Troy Tulowitzki reported his legs felt “heavy,” but indicated it wasn’t serious. Still, manager Walt Weiss decided not to put Tulowitzki in the starting lineup for Friday night’s game against the Rays. It would be Tulowitzki’s third time out of the lineup in the past four games.

Hanley Ramirez, in his third start back from thumb surgery, suffered a serious left hamstring injury Friday night running the bases and is expected to be placed on the disabled list Saturday.

Jason Vargas pitched the first shutout for the Angels this season, limiting the Orioles to three hits and two walks and keeping a short-handed bullpen bored in a 4-0 win at Angel Stadium.

With Chase Headley on base, Yonder Alonso had a go-ahead, two-run home run in the fifth inning Friday to help lead the Padres to a 7-6 victory over the D-backs at Petco Park.

There may come a time when D-backs general manager Kevin Towers tires from watching the work of his bullpen, but he’s not there yet.

Orioles first baseman Chris Davis left Friday night’s game against the Angels in the top of the fifth inning with a right knee injury

Doug Fister cruised through the first six innings before giving up the lead in the seventh, but Alex Avila came to the rescue with a go-ahead two-run homer in the ninth to spur the Tigers to a 4-3 win over the Astros on Friday at Minute Maid Park.

Under the firm hand of manager Buck Showalter, the Orioles are using the same formula that shocked all the critics last season: timely hitting, power, defense, adequate starting pitching and tremendous relief work. There’s also that great intangible that simply defies quantification: chemistry.

Just when things seem to be going wrong for the Mets, Jordany Valdespin finds a way to make them right. Valdespin’s pinch-hit walk and stolen base led to Ruben Tejada’s RBI single in the 10th inning Friday, leading the Mets to a wild 7-5 win over the Braves at Turner Field.

Rookie Shelby Miller bested former Cardinal Kyle Lohse for the second time in three weeks and Matt Holliday homered to snap an 0-for-10 skid, and St. Louis beat the Brewers, 6-1, on Friday night at Miller Park.

The performance in the St. Louis bullpen so far this season has not been satisfactory. But the Cardinals appear to have some really viable solutions.

Drew Stubbs recorded four hits, including three doubles, the last of which gave the Indians a 7-6 walk-off win over the Twins on Friday at Progressive Field.

The Rangers broke through with five runs in the fourth inning to support the pitching of Derek Holland as they rolled to a 7-0 victory over the Red Sox at Rangers Ballpark in Arlington.