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GLENDALE, Ariz. -- Two of the running backs the San Francisco 49ers named inactive Monday night would be starting if available to the opposition.

Such is the injury imbalance for the 49ers and Arizona Cardinals.

Running backs Brandon Jacobs and LaMichael James are both inactive for the 49ers. Arizona is without its top two backs, Beanie Wells and Ryan Williams.

Also inactive for the 49ers: quarterback Scott Tolzien, receiver A.J. Jenkins, safety Trenton Robinson, guard Joe Looney and nose tackle Ian Williams.

The Cardinals' list features quarterback Kevin Kolb, receiver LaRon Byrd, cornerback Greg Toler, linebacker Jamaal Westerman, guard Senio Kelemete, guard Adam Snyder and tight end Todd Heap.

Rich Ohrnberger will start ahead of Snyder at right guard. LaRod Stephens-Howling starts at running back for Arizona. Wells can return from injured reserve Nov. 25. Williams is out for the season.

San Francisco 49ers fans periodically ask when the team's 2012 draft class might begin contributing on the field.

Like other top teams, the 49ers drafted late in the order. Their roster was already quite strong. That combination has made it tougher for the 49ers' rookies to earn playing time. It doesn't necessarily mean their draft choices are falling short. It just means they're not playing yet.

With an assist from Hank Garguilo of ESPN Stats & Information, I've put together charts showing games played, games started and offensive/defensive snap counts for every 2012 NFC West draft choice through Week 6.

The 49ers are the only team in the league with zero snaps from their 2012 class. The 6-0 Atlanta Falcons' draft choices have played 25 snaps, the second-lowest total. The 30 remaining teams have gotten at least 215 snaps and an average of more than 700.

Seattle ranks fifth with 1,092 snaps from 2012 draft choices, followed immediately by St. Louis at 988. Arizona ranks 14th with 806. Right tackle Bobby Massie has played 424 of those, more than any team has gotten from its fourth-round choices. Seattle leads the league in snaps from seventh-rounders while ranking second in snaps from third-rounders. The Rams are second in snaps from second- and seventh-rounders.

Arizona Cardinals

Quick notes: Michael Floyd is getting work as the fourth receiver. He had a 24-yard reception Sunday. He has seven catches for 84 yards and a touchdown. ... Massie is getting valuable experience. He's been a liability in pass protection against some opponents. That was to be expected. ... Cornerback Jamell Fleming's playing time has fluctuated based on Greg Toler's availability. ... Ryan Lindley becomes the No. 2 quarterback behind John Skelton now that Kevin Kolb is injured. The team could conceivably re-sign Rich Bartel in the future. The Cardinals do like Lindlely's potential, however.

Seattle Seahawks

Quick notes: Bruce Irvin has 4.5 sacks, including one to help preserve a victory at Carolina. ... Second-round choice Bobby Wagner has provided a significant upgrade at middle linebacker. He opened the season as a starter and member of the base defense. His has become an every-down player over the past two weeks, with positive results, including when he ran down Cam Newton for a loss. ... Russell Wilson owns two fourth-quarter comeback victories in his first six starts, two more than Seattle managed last season. He is the first rookie since the 1970 merger to throw winning touchdown passes in the final two minutes of two games. ... Robert Turbin's speed and power have impressed. ... J.R. Sweezy impressed in camp and started the opener, but he wasn't ready. ... Greg Scruggs is healthy again and figuring into the pass-rush rotation.

San Francisco 49ers

Quick notes: Trenton Robinson has played on special teams, but he has been inactive recently. A.J. Jenkins has been active without playing. The 49ers have established players ahead of him at wide receiver. They also use two backs and/or two tight ends frequently, diminishing opportunities for wideouts to get on the field. Michael Crabtree, Mario Manningham, Kyle Williams and Randy Moss are competing for those limited snaps. ... LaMichael James' arrival provided incentive for Kendall Hunter, who has met the challenge. Might there be a role for James later in the season? So far, the 49ers haven't even activated veteran Brandon Jacobs. ... Joe Looney projects as a potential future starter at guard, but there might not be an opening if Alex Boone continues playing well. Boone seized the job while Looney was recovering from foot surgery. ... Darius Fleming suffered a knee injury and remains on the physically unable to perform (PUP) list. ... The team released sixth-rounder Jason Slowey. ... Seventh-rounder Cam Johnson is on the practice squad.

St. Louis Rams

Quick notes: First-round defensive tackle Michael Brockers has recovered from an ankle injury well enough to become a big part of the Rams improving run defense. ... Brian Quick made a key reception over the middle to help the Rams beat the Seahawks, but fourth-rounder Chris Givens has made a bigger impact among the Rams' rookie wideouts. Givens has a reception of at least 50 yards in each of the Rams' last three games. That is a first for any NFL rookie since Willie Gault in 1983. ... Janoris Jenkins has been a playmaker at cornerback all season. He suffered a significant lapse in coverage at Miami, but overall, Jenkins has shined. ... Fifth-rounder Rokevious Watkins reported out of shape and landed on injured reserve. ... Sixth-rounder Greg Zuerlein has transformed the Rams' offense with his extended field-goal range, although he struggled some in Week 6. ... Seventh-rounder Daryl Richardson has a 5.2-yard average per carry and 246 yards rushing. He has won playing time from second-rounder Isaiah Pead, who has not been a factor.

First impressions on the Arizona Cardinals' performance in the 2012 NFL draft:

What I liked: The Cardinals appeared to resist reaching to fill needs. The approach left Arizona with a huge need for an offensive tackle heading into the third day, but with no second-round choice entering this draft, the Cardinals lacked flexibility. They stayed patient amid criticism and drew high marks for landing Mississippi tackle Bobby Massie in the fourth round. We don't know whether Massie will become a good player, but we do know some had him rated as a potential second-round choice, and Arizona got him in the fourth.

Question marks: The team's decision to acquire Kevin Kolb last offseason hung over this draft. The Kolb trade gave the Cardinals' second-round choice to Philadelphia, preventing Arizona from seriously considering any of the four offensive tackles teams drafted in the round. Mitchell Schwartz (Cleveland Browns), Jonathan Martin (Miami Dolphins) and Jeff Allen were gone before Arizona would have chosen, but Mike Adams (Pittsburgh Steelers) was still there. Martin and Allen went within four choices of Arizona's slot in the round, close enough for the Cardinals to have considered trading up, had they still possessed the pick.

Trending: Arizona and Tennessee are the only teams to have drafted zero offensive linemen in the first three rounds over the past five drafts. Both teams lean on Hall of Fame guards to coach up the position, but the Cardinals in particular haven't had enough young linemen to develop. That changed in this draft. The Cardinals selected three offensive linemen after drafting zero in any round over the previous two drafts. That's a start, even if the team didn't take one early.

Veteran put on alert: Kolb. The Cardinals used their first-round pick for receiver Michael Floyd. Running back Ryan Williams, a second-round choice last year, will be returning from injury. Arizona drafted Massie to stabilize the line. With five of seven picks going for offense, including one to select a developmental quarterback, it's time for Kolb to produce.

The 2012 NFL draft has finished.

I've put together a chart showing all the NFC West picks.

Seattle drafted an NFL-high eight players on defense. One, defensive tackle J.R. Sweezy, projects as a guard. No other team drafted more than six defensive players, by my count.

Total draft picks: Rams 10, Seahawks 10, Arizona Cardinals 7, San Francisco 49ers 7.