Having $3 million in salary cap room doesn't necessarily eliminate the possibility of the Steelers signing any free agents, but it doesn't suggest there are multiple moves yet to be made.
If anything, the visits of running back James Starks and wide receiver Lance Moore scheduled for Tuesday, with both visits being reported over the weekend, suggests the Steelers either took Monday off for St. Patrick's Day (certainly a possibility, given the Rooney family's Irish heritage), or they're using the day to dig into their current contracts to see if a few more cap dollars can be freed up.
The transition tag of Jason Worilds should be considered the lowest hanging fruit. At $9.75 million for this season, it seems like the team has the most space to be freed up with the least risky decision. If they thought enough of Worilds to tag him in the first place, eating up a substantial amount of space cleared by the releases of Levi Brown and Larry Foote and the extensions given to Troy Polamlau and Heath Miller, it seems reasonable they would have tagged him to buy some time to negotiate for a long-term deal.
Lawrence Timmons' $6.75 million base salary and three years remaining on his deal, should the Steelers go the restructuring route, it seems like the prime candidate.
The notion of signing what equates to a back-up running back and a slot receiver being important enough to necessitate such moves is a tad overblown, but it isn't necessarily because of them. The Steelers should still consider pursuing defensive end Alex Carrington, considering his youth and proven ability. He's coming off a torn quadriceps suffered early in 2013, but could be a starting defensive end for the Steelers as well as a third down pass-rushing option.
Jerricho Cotchery is visiting with the Carolina Panthers, and behind him on the 2013 Steelers is exactly eight catches at the professional level. Bringing him back should be a priority, and perhaps Moore is a back-up option (or a leverage chip against Cotchery).
Starks, though, should be considered a quality depth-add for the Steelers, who have even less depth at running back than they do at wide receiver. Le'Veon Bell will be the unquestioned workhorse this season, but they do not have a rostered running back behind him currently. Jonathan Dwyer signed with Arizona and Felix Jones and LaRod Stephens-Howling are both still free agents.
If the Rooneys are enjoying St. Patrick's Day, good for them. There's plenty of work still to be done when the celebration ends, though.