49ers place NaVorro Bowman, Glenn Dorsey on injured reserve

The San Francisco 49ers made a pair of roster moves on Saturday, both of which are not shocking, but I suppose maybe a little surprising. The team announced it is placing linebacker NaVorro Bowman and defensive tackle Glenn Dorsey on injured reserve. To fill the two roster spots, the 49ers promoted cornerback Marcus Cromartie and guard Andrew Tiller from the practice squad.

Bowman was activated off the PUP list earlier this week, while Dorsey had been activated from short term injured reserve for a few weeks now. Dorsey was back at practice, while Bowman was continuing his rehab. With only three games remaining, and the 49ers playoff chances dwindling, it is not a big surprise both players have had their seasons ended. Given the timeline heading into this season, both should be ready for training camp next July, and hopefully they can get involved in the offseason workout program beyond just rehab.

The promotion of Cromartie provides the team more depth at cornerback, where they have dealt with numerous injuries. Tramaine Brock remains sidelined with a hamstring injury, and Chris Culliver suffered a knee injury last week. Culliver was a limited participant in practice all week, and is listed as questionable. I think he ends up active on Sunday, but the team wants an extra body available in case the knee acts up at some point. Last week, the 49ers were down to Perrish Cox, Dontae Johnson and Leon McFadden as true cornerbacks.

Tiller provides some offensive line depth, although he probably ends up a game-day inactive against the Seahawks.

Here is what the 49ers PR department had on the two promotions:

Cromartie (6-0, 195) was originally signed as an undrafted free agent by the San Diego Chargers on April 27, 2013, and was signed to the team's practice squad the following training camp. Cromartie was later promoted to the Chargers active roster on December 17, 2013, where he spent the rest of the season. He was waived by San Diego on September 23, 2014, and signed to the Cleveland Browns practice squad on October 29, 2014. Cromartie was later released by Cleveland on October 30, 2014, and was signed to the 49ers practice squad on December 13, 2014.

A 24-year-old native of Mansfield, TX, Cromartie played collegiately at Wisconsin, where he appeared in 39 games and registered 113 tackles, 16 passes defensed, one interception, one forced fumble and one fumble recovery. As a senior, Cromartie earned All-Big 10 honors.

Cromartie will wear No. 47.

Tiller (6-4, 324) was originally drafted by the New Orleans Saints in the sixth round (179^th overall) of the 2012 NFL Draft. After spending the 2012 season with New Orleans, he was waived on August 31, 2013. He was signed to the San Diego Chargers practice squad on September 25, 2013 and was later released on November 18. He was signed to the Green Bay Packers practice squad on November 20, 2013, where he spent the remainder of the season. Tiller was later released by the Packers on August 30, 2014, and was signed to the 49ers practice squad on October 7, 2014.

A 25-year-old native of Brentwood, NY, Tiller attended Syracuse University where he was an All-Big East First-Team selection in 2011.

Tiller will wear No. 61.