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8/21/2013 4:02 P.M. ET

Mariners hopeful Franklin can return for Friday's opener

OAKLAND -- The Mariners are optimistic that Nick Franklin will miss just one game after sustaining a laceration on his left knee that required five stitches in Tuesday's 7-4 comeback win against the A's.

Franklin scored the fourth run of Seattle's five-run eighth inning by sliding through Derek Norris' attempt to block the plate, which resulted in both players exiting the game.

Franklin said after the game that doctors told him he'd be out four or five days, but acting manager Robby Thompson said Friday's opener against the Angels in Seattle is a possibility with an off-day Thursday.

"I think they'll be able to pad it up to protect it," Thompson said, adding that Franklin's ability to play through the pain will be the deciding factor, not the stitches themselves.

With the location of the gash, bending the knee, sliding and diving could prove difficult for the rookie second baseman.

Brad Miller started at second base and led off for the Mariners on Wednesday in Franklin's place, with Brendan Ryan playing shortstop. Thompson said he considered moving Dustin Ackley to second base, but opted to keep him in left field because of starter Hisashi Iwakuma's tendency to induce ground balls.

Comeback win one of few this season for Seattle

OAKLAND -- Tuesday night's 7-4 victory against the A's was only the Mariners' third win of the season when trailing after seven innings.

Seattle scored five runs in the eighth inning off an A's bullpen that owns the second best ERA in the American League at 2.96, has allowed the fewest walks (107) and is tied for the lowest opponents' slugging percentage at .346.

The Mariners are now 3-50 on the season when trailing after seven, with their second win of the sort coming last week in a 3-1 win against the Rangers.

"It was a great comeback," said Brad Miller, who drove in one of the Mariners' runs in the eighth. "They obviously have one of the best bullpens going. We strung eight quality at-bats in a row. That's huge, and I think it tells you something about this team and where we are right now and the direction we're headed."

Seven Mariners reached base before an out was recorded in the eighth to come back from a four-run deficit after starter Joe Saunders allowed four runs in the first inning.

"You play until the end, until that last out is made," acting manager Robby Thompson said. "And that's what they did yesterday, played the whole game out. Sometimes it happens the way it did last night, and sometimes you fall a little short. All you can do is play a full game until that last out is made."

Jeff Kirshman is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.