The Vikings trade with Washington for quarterback Donovan McNabb was completed Wednesday evening, but all was quiet Thursday.

That neither team made an official announcement came as no surprise considering the uncertain rules the NFL is operating under this week in the days following the lockout. Trades could be made starting at 9 a.m. Tuesday, but the signing of free agents can't be announced until 5 p.m. Friday.

Things are murky, in part because McNabb's contract is being reworked. The Vikings and Redskins are showing caution in how they approach any type of public statements. There is a possibility the announcement will come Friday evening when McNabb's new contract becomes official. It's uncertain when he will be introduced to the Twin Cities media, but the team will report to Mankato training camp on Sunday, and he could speak then.

Frampton to returnThe Vikings have agreed to terms with safety and special-teams ace Eric Frampton, who has been with the team since being signed during the 2007 season. He becomes the second free agent the Vikings have retained, joining kicker Ryan Longwell. Frampton finished tied for third on the Vikings last season with 10 tackles on special teams in 14 games. Meanwhile, free-agent linebacker Ben Leber remains optimistic about his chances of returning.

Etc.• The Vikings signed undrafted free agents Ed Barham (tight end, North Carolina) and Alexander Robinson (running back, Iowa State) on Thursday, giving the team roster 16 rookie free agents. The move to sign Robinson, a DeLaSalle grad, came a day after Kentucky running back Derrick Locke failed his Vikings physical and signed with the Eagles.

• The Vikings have yet to agree to terms with any of their draft picks. First-round pick Christian Ponder likely won't sign until Saturday, at the earliest.