The 49ers today signed center/guard Marcus Martin, the first of their three third-round draft picks, to a four-year deal. That means all 12 draft picks are under contract just one week into the OTA period.
Martin, who played at USC, intially will back up Daniel Kilgore at center and fill in at both left and right guard. He played those positions, especially left guard, during Wednesday’s OTA practice.
* The team struck an injury settlement with offensive tackle Luke Marquardt, who broke his foot his foot in practice earlier this month. The 49ers waived/injured Marquardt, an undrafted rookie from Azusa Pacific, this week.