The opening crush of free agency has ended and there are still a bunch of players out there -- and some holes the Detroit Lions need to fill. The franchise, for now, doesn’t have a ton of cap room at between $5 million to $6 million, but the team could make a move or two in the next week.

Here are some potential targets for Detroit, both with its own free agents and ones outside the organization.

Quarterbacks: None.

Running backs: It is more likely Detroit solves this in the draft as there are bigger needs out there, but these two players could be worth taking a shot on.

Stevan Ridley (New England): At age 26, he would likely command more money but he’s coming off a torn ACL, which could make him primed for a short-term deal coming at a cheaper cost. He isn’t much of a receiving threat but he could split the rushing load with Joique Bell, leaving Theo Riddick to a pass-catching role he is better suited for.

Pierre Thomas (New Orleans): He’s 30 years old so Thomas could be a short-term signing who would come on the cheap. He has familiarity in the offense and with Joe Lombardi. He doesn’t have the wear of other rushers as he’s never had more than 147 carries in a season. As a cut, Thomas also would not count against compensatory selections.

Wide receiver: Like running back, this is likely an area the Lions solve in the draft, but there are some interesting options out there who could happen on the cheap.

Andre Holmes (Oakland): He would be intriguing on the outside at 6-foot-4 and could give Detroit more flexibility with Golden Tate inside and outside. He’s a restricted free agent, but he was undrafted and was given an original round tender, so though the Raiders could match any offer they would not receive compensation if he leaves.

Tight end: None.

Offensive tackle: None.

Interior line:

Justin Blalock (Atlanta): Blalock visited the Lions on Thursday and left without signing a contract. According to a source, St. Louis and Tennessee have also showed interest. He graded out as the No. 25 guard last season and spent all of last season at left guard. If the Lions were to sign Blalock, they would probably still draft a guard in the early rounds (maybe the second day) and have him groom his eventual replacement. He’s been pretty durable throughout his career.

Rob Sims (Detroit): If Blalock heads elsewhere, the Lions could turn back to their starter from last season. Sims would provide a veteran presence and would be a good mentor to a young interior lineman who would eventually replace him. He has had knee issues in the past, but he played every game last season for Detroit and believes he still has something left.

Stefen Wisniewski (Oakland): While Travis Swanson appears to be the center of the future for Detroit, Wisniewski could be intriguing enough to contemplate keeping Swanson at guard. The former Raiders center turns 26 later this month and is still young enough to be improving. He is a much better run-blocker than pass-blocker so he could help fix a struggling Lions rushing attack.

Defensive line:

Ahtyba Rubin (Cleveland): The 28-year-old has 338 career tackles and 12 sacks. He’s not going to be a top defensive tackle but could fit well rotationally behind two good starters. He could be a decent second starter, but not a No. 1 tackle.

Randy Starks (Miami): The Dolphins cut Starks on Wednesday to help make room for Ndamukong Suh. At age 31 he isn’t going to command high value, but he is a much better pass-rusher than run-stuffer and the 6-foot-3, 305-pounder could be a good pairing with Haloti Ngata. He has 385 career tackles and 41 sacks since being drafted in the third round in 2004 by Tennessee out of Maryland. He would be another strong veteran addition to pair with Ngata and have Tyrunn Walker and a draft pick learn from for a season.

Linebacker: None.

Cornerback:

Rashean Mathis (Detroit): He would appear to be the mostly likely option at this point in a market where many options have already gone elsewhere. Mathis played extremely well last season, rated by Pro Football Focus as the No. 12 cornerback, so Detroit could be banking on one more years of standout play. If Mathis somehow heads somewhere else, Charles Tillman, Ike Taylor and Antoine Cason are three options that are out there. Tillman and Taylor, like Mathis, would likely be short-term options. Cason has been with three teams in two seasons.

Safety: None.