ALAMEDA -- Offensive lineman Rodger Saffold, who agreed to a five-year contract worth a maximum of $42.5 million, failed his physical and won't be joining the Raiders, the club announced Wednesday night.

According to ESPN, Saffold reached an agreement on a five-year contract to return to the St. Louis Rams with the Raiders having concerns over the condition of his shoulder.

It's a setback for general manager Reggie McKenzie, who focused on the Rams tackle and guard, allowing incumbent left tackle Jared Veldheer to get away to the Arizona Cardinals for less money than he offered Saffold.

Saffold's voided deal included $15.75 million in guaranteed money, while the Cardinals signed Veldheer for $10.5 million in guarantees.

McKenzie was unavailable for comment as the Raiders were hosting other potential free agents. Mike Silver of the NFL Network reported that owner Mark Davis decided against completing the deal rather than have a big-ticket free agent face a possible surgery and rehab.

Having missed 17 games in his career and not playing a full season since his rookie year in 2010, Saffold had issues including a torn pectoral muscle, a shoulder injury, a head injury and a sprained MCL that caused him to miss Weeks 3 through 7 last season.

The Rams, reported ESPN's Adam Schefter, "had no concerns whatsoever'' about Saffold's shoulder and quickly worked to bring him back.

Losing Saffold puts the Raiders back in the market for an offensive lineman, even with the addition of Austin Howard, the right tackle from the New York Jets whose signing was made official Wednesday.

The 2014 draft is heavy in talent at tackle, with three players possibly worthy of the No. 5 overall pick in the draft -- Greg Robinson of Auburn, Taylor Lewan of Michigan and Jake Matthews of Texas A&M.

Saffold becomes another trouble personnel issue under McKenzie's watch as general manager.

In last season's draft, the Raiders selected DJ Hayden, a cornerback out of Houston, with the No. 12 pick in the first round. Hayden was coming off surgery from a ruptured vein leading to his heart. Complications from scar tissue essentially negated his entire rookie season.

The Raiders also traded for Seattle quarterback Matt Flynn, who flopped in part because of persistent arm trouble that had been a problem with the Seahawks. Flynn was beaten out by Terrelle Pryor and released, pocketing $6.5 million in guaranteed salary.

While the Raiders attempted to upgrade their offense on the first day of free agency, they were concentrating on defense Wednesday.

According to various reports, free agent defensive end Justin Tuck (New York Giants), outside linebacker LaMarr Woodley (Pittsburgh Steelers) and defensive tackle Jason Hatcher (Dallas Cowboys) visited the facility.

The Houston Chronicle reported defensive tackle Antonio Smith (Houston Texans) had also lined up a visit, although it didn't specify a day.

Together, the four players have combined for 186 career sacks. Tuck and Hatcher had 11 each last season. Raiders coach Dennis Allen told reporters at the NFL scouting combine that a priority was upgrading the pass rush.

Other free agents who reportedly were in town included two more Giants -- running back Andre Brown and cornerback Terrell Thomas.

Tuck, whose visit was reported by ESPN, is 30 years old but coming off a solid season. He is a two-time Super Bowl champion and two-time Pro Bowler with 601/2 sacks who is reportedly giving thought to returning to the Giants.

Woodley, 6-foot-2, 256 pounds, is an outside linebacker in Pittsburgh's 3-4 defense who could be used to rush the passer in Oakland's predominantly 4-3 alignment. Woodley has 57 career sacks, although he hasn't reached double figures since 2010.

With the Steelers, Woodley has reached one Pro Bowl and has one Super Bowl championship. He said on his Twitter account he was headed to Oakland.

Hatcher, 31, had 42 starts in 119 career games with Dallas. He forced two fumbles in addition to his 11 sacks last season, when he flourished after the Cowboys converted to a 4-3 defense. Hatcher confirmed his Oakland visit on Twitter.

Smith, 32, is a 10-year veteran with 411/2 sacks who has played as a tackle in 4-3 defense and as an end in a 3-4.

For more on the Raiders, visit the Inside the Oakland Raiders blog at ibabuzz.com/oaklandraiders. Follow Jerry McDonald on Twitter at twitter.com/Jerrymcd.

Saffold
Losing lineman leaves a huge void on the offensive front for the Raiders.