Here’s one blogger’s grades for the Rams after Sunday’s 21-13 loss to the Arizona Cardinals:

QUARTERBACK: Marc Bulger’s statistics — 19 of 37 for 215 yards, 0 TDs, one interception, 57.8 passer rating — suffered considerable damage because his mostly young and mostly new crop of wide receivers weren’t always where they were supposed to be at the end of routes. Still, a couple of Bulger’s passes were off the mark, and he threw a bad interception late in the first half. But this wasn’t his worst day. GRADE: C

RUNNING BACK: Another determined performance by Steven Jackson, who rushed for 116 yards on 24 carries and became the first ballcarrier in franchise history to top 1,000 in five consecutive seasons. Jackson was targed only twice as a receiver, and he got 0 yards on those catches. GRADE: A-

RECEIVERS: The young WRs are maturing. Donnie Avery, Brandon Gibson and Danny Amendola combined for 13 catches and 187 yards. Amendola and Avery both made tough grabs in traffic. Gibson occasionally wasn’t in sync with Bulger, not surprising considering his short time with the team. The TEs contributed just three receptions for 23 yards. GRADE: B-

OFFENSIVE LINE: The unit didn’t have its best outing, although it wasn’t bad, either, against a very good run defense. Bulger was sacked three times and Jackson had to bore out his yardage without much help at times. The absence of RT Jason Smith with a head injury in the second half could’ve been an unsettling factor. Adam Goldberg was whistled for an inopportune personal foul in the late going. GRADE: C+

DEFENSIVE LINE: DE Chris Long got his third sack in as many games and the Rams put some pressure on the Cards QBs. But the Rams were woeful vs. the run. Tim Hightower and Beanie Wells rolled up a cumulative 184 yards on the ground, including a whopping 126 in the first half, when the Big Red piled up a 21-3 lead. GRADE: D

LINEBACKERS: Rookie MLB James Laurinaitis was everywhere, getting a game-high 16 tackles (unofficial press-box stats). SLB David Vobora had some good moments, including a forced fumble that the Rams recovered. Paris Lenon did little at WLB. GRADE: B

SECONDARY: Cardinals QBs completed 19 passes to non-backs, with Pro Bowl WRs Anquan Boldin (8 catches, 103 yards, one TD) and Larry Fitzgerald (8 catches, 87 yards, one TD) doing most of the damage. Rams coverage was spotty: at times, it was pretty good, and at other times, the Arizona receivers were strikingly wide open. GRADE: C-

SPECIAL TEAMS: Donnie Jones was outstanding, averaging 51.3 yards (46.5 net) on four punts. Josh Brown hit on both his field goal tries, from 40 and 20 yards. Danny Amendola was scintillating on a 40-yard kickoff return to open the second half and averaged an impressive 30.3 on three tries. Rams coverage was OK. GRADE: B+

COACHING: HC Steve Spagnuolo probably should’ve gone for a FG on 4th-and-7 and the Rams down 21-13 with about 3 1/2 minutes to go. With all the Rams’ timeouts left and the Cardinals getting little out of their offense at the time, the Rams almost surely would’ve gotten the ball back with the prospect of a TD putting them ahead. Nice day for special-teams coach Tom McMahon’s unit. No quarrels with OC Pat Shurmur’s play-calling. DC Ken Flajole’s outfit was shredded in the first half, but rebounded (after Warner left the game). GRADE: C+