A look at today's 49ers game vs. Miami; including, game information, matchup to watch, three keys to the game and injury report.
49ERS GAME AT A GLANCE
Opponent: Miami Dolphins
Time: 1:05 p.m.
Line: 49ers by 10
Records: 49ers 8-3-1, Dolphins 5-7
TV/Radio: Ch. 13 (Greg Gumbel, Dan Dierdorf), 680, 1320
MATCHUP TO WATCH
49ers outside linebacker Aldon Smith vs. Dolphins left tackle Jonathan Martin
"Congratulations, rook! You're our new left tackle. Now go out and stop the NFL's sack leader." That's the message this week for Martin, the Dolphins' second-round pick, who moves from right to left tackle to replace injured veteran Jake Long. Smith is five sacks shy of Michael Strahan's NFL single-season sack record (221/2 in 2001). Miami likely will give Martin plenty of help in the form of extra blockers, which could open things for fellow outside linebacker Ahmad Brooks.
THREE KEYS TO THE GAME
The 49ers are fourth in the league in penalties, including 21 in their last two games. The team has to clean up its play and stop putting quarterback Colin Kaepernick in third-and-long situations.
Running back Reggie Bush had big games against the 49ers when he was with the Saints. Alex Smith's former high school teammate is averaging 4.4 yards a carry and leads the Dolphins with 726 rushing yards.
David Akers obviously is struggling on field goals from beyond 50 yards. The 49ers need to help the kicker get his groove back in time for the playoffs by giving him easier attempts that can rebuild his confidence.
Doubtful: WR Mario Manningham (shoulder)
Probable: K David Akers (pelvis), LB NaVorro Bowman (shoulder), CB Tarell Brown (hamstring), CB Chris Culliver (illness), LB Tavares Gooden (knee, elbow), RB Frank Gore (wrist), G Mike Iupati (shoulder), CB Carlos Rogers (knee), LB Aldon Smith (shoulder), LB Patrick Willis (shoulder).
Questionable: S Jimmy Wilson (hip)
Probable: TE Charles Clay (ribs), LB Karlos Dansby (biceps), TE Anthony Fasano (hip), P Brandon Fields (left knee, right knee), RB Jorvorskie Lane (knee), LB Koa Misi (finger), LB Austin Spitler (ankle).