Reggie Bush wasn’t at his best Sunday. Anyone with access to a stats sheet — he had just 67 rushing yards and averaged a season-low 3.9 yards per carry against Arizona — could tell you that.

Wednesday, Bush explained why: The injured left knee that limited him in practice the week before did so in the game, as well.

“I was hurting; I’m not going to lie,” Bush said. “I tried to fight through it. I did the best I could.”

Bush gutted it out in Arizona, playing in 47 of the team’s 78 offensive snaps. Yet both his production on the ground and in pass protection suffered.

Bush told reporters Wednesday that the knee — hurt against the Jets in Week 3 — felt much better than the week before. The league’s sixth-leading rusher was able to practice on a limited basis.

“I’m not going to make any excuses,” Bush added. “I’ve got to play better. I didn’t play well at all.”

Long not strong?

Jake Long also had a game that wasn’t up to his Pro Bowl standards, struggling with run blocking for the second consecutive week, according to Pro Football Focus, which grades every play.

Long, who is the league’s 43rd-ranked tackle entering Week 5, also allowed a sack for the second time in three games after surrendering just five all last season.

“I’m working to get better every single game,” said Long, who has been selected to the Pro Bowl every year he’s been in the league. “I think I’ve done some good things. I’ve had some bad plays too. But just working every single day to get better, and I think I’ve gotten better as time has gone on.

Added coach Joe Philbin: “He’s playing well. I’m overall pleased with the offensive line. There’s not a player on the team that I’m satisfied with, but I think overall, he’s contributing nicely.”

Film studies

The topic du jour in the Dolphins’ locker room was ESPN’s documentary Broke, the Billy Corben film on former professional athletes who went bankrupt just years after retiring from a career that made them millions.

The Dolphins saw it as an educational tool. The staff put a flier in each locker Tuesday promoting the program, and most players said they either tuned it live, or had recorded it and intend to watch it soon.

“I still tell people no,” Bush said. “It’s very tough. It’s not going to be so much to people bringing you business opportunities. It’s going to be the people closest to you. Family members. Brothers, aunts, uncles, cousins, moms, dads.

“Those are the people are kind of entitled and feel they’re more entitled than they are.”

Guard Richie Incognito quipped on Twitter Tuesday night: “They should rename #Broke and call it #DUMB.”

Injury report

While Bush practiced on a limited basis Wednesday, linebacker Kevin Burnett (foot), cornerback Nolan Carroll (Achilles) and cornerback Richard Marshall (back) were held out altogether.

Defensive tackle Tony McDaniel (hip) practiced some after missing the last few years, as did linebacker Austin Spitler (groin).

Wide receiver Marlon Moore (hamstring) and defensive tackle Paul Soliai (ankle) participated fully.

Even after promoting De’Andre Presley from the practice squad, the Dolphins still had an open spot on their 53-man roster as of late Wednesday afternoon. Defensive back Julian Posey took Presley’s spot on the developmental squad.