Should 49ers kick the tires on Evan Mathis?

Here is Part II of this weekend’s San Francisco 49ers Twitter mailbag ...

@PGutierrezESPN: @njninerfan499: Let's put it this way: They should be. The 49ers have long insisted they will look at any potential moves that would improve the team and, well, signing a two-time Pro Bowl guard would definitely shore up a re-shuffled offensive line that saw quarterback Colin Kaepernick sacked a league-leading 52 times last season. Evan Mathis was a cap casualty when the Eagles cut him last week, as he was due to make $5.5 million after appearing in just nine games in 2014 and will turn 34 on Nov. 1. Now, I'm not suggesting the Niners over-pay for Mathis' services, but with the slew of recent retirements, it did create $25 million in cap space over the next year and $40 million in 2017, per ESPN NFL Insider Adam Schefter. Oh, and one of those retirements, right tackle Anthony Davis, has had a domino effect on the O-line already, with veteran guard Erik Pears moving to right tackle, and right guard Alex Boone seeing reps at left guard. Imagine, then, a Niners' O-line of LT Joe Staley, LG Mathis, C Daniel Kilgore, RG Boone, RT Pears.

@PGutierrezESPN: @sfrooster: Over-unders for a UNLV alum, eh? Right here, right now, I'd take the over. In fact, in the immediate aftermath of the schedule being released in April -- before the draft and offseason workouts -- I had the Niners going 7-9, albeit after a rough 1-6 start. Still, there is a sense of optimism bounding about Santa Clara these days under the magnanimous Jim Tomsula that feels much different than it did under the more frenzied Jim Harbaugh. Plus, there's a sense that the offense is truly going to take the training wheels off of Kaepernick this season to bring some, well, fun back to the game. Will it translate to victories, though? Check back in late August.

@PGutierrezESPN: @AFNinerFan: Keith Reaser impressed the coaching staff during OTAs and minicamp, no doubt. But Jimmie Ward, the Niners' first-round draft pick last year who is still recovering from re-breaking his foot last season, is more in a competition with this year's second-rounder, JaQuiski Tartt, to be the nickel corner. Even if they are best friends from high school. It's hard to see Ward as trade bait, given his high draft standing, and it's even tougher to see the Niners getting good value for him because of his foot issues. In June, the starting corners are Tramaine Brock and Shareece Wright, with the likes of Reaser, Kenneth Acker, Chris Cook and Dontae Johnson jockeying for position and Ward and Tartt readying for an intriguing camp battle.