The Detroit Lions haven't had a great showing at home this season, winning only three times at Ford Field and treating their fans to much frustration along the way. This weekend,49ers jerseys for Cheap the team has a chance to go out on a very high note against the San Francisco 49ers, who have been very woeful themselves this season. Offensively, the 49ers can't score, meaning the pressure will be on their defense to get the job done against a Lions' offense which has done the job well lately. What do the 49ers bring to this post-holiday match up? Here's a look. Opposing Player To Watch: Aaron Lynch, LB. Argiably one of the 49ers best defenders, Lynch has been missing with a concussion for the last two weeks, but did return to practice this week. His 6.5 sacks leads the team, and he is an active player when healthy and engaged capable of making big plays to lead his defense. How healthy and active will Lynch be? Key Personnel Group: Linebacker. The 49ers have a great group of active linebackers that fly around to the ball and make plenty of big plays blitzing the quarterback. NaVorro Bowman, Lynch, Ahmad Brooks and Michael Wilhoite are capable of erasing an offense themselves, and can snuff out a running game quickly as well as cover ground in the passing game. It will be important for Detroit's protection up front to be keyed in, given this group is very active. Biggest Name Missing: Alex Boone, G. Last weekend, Boone was injured against the Cleveland Browns and has missed time this week in practice,San Francisco 49ers Jerseys Online leading to questions about whether he will be available for Sunday's game. Boone's loss would be significant, as he is one of the better linemen up front at protecting the quarterback and helping the running game. Ravaged by injuries, San Francisco's line can't afford to endure another one. Blaine Gabbert might be running for his life. Can They Defend? No. The 49ers are nearly as bad as the New Orleans Saints at defending both the run and pass, ranking 27th on the ground with 18 touchdowns allowed and 26th against the pass with 19 touchdowns allowed. Those are numbers that are lower to the pack. One thing San Francisco does well is rush the quarterback, as they have 26 sacks. Given the struggles of protecting Matthew Stafford, this is an important dynamic to note. Headset Heads Up: In a battle between Jim Tomsula and Jim Caldwell, who wins? Tomsula has been on shaky ground since nearly the season began taking over for Jim Harbaugh, and he's been outcoached along the way by plenty in the league. What can Tomsula do to beat a suddenly resurgent Caldwell and company? The pressure's on him to show some wrinkles and net a big win.