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Monday practice report from the Bubble

The Dolphins are back at work today, this time inside the Nick Saban Memorial Bubble (NSMB), and here is what's going on:

The Dolphins have confirmed the trade of offensive linemen Andy Alleman and Ikechuku Ndukwe to the Kansas City Chiefs for an "undisclosed" 2010 draft choice. As I said earlier, it's absolutely a second-day pick.It is also higher than a seventh-round selection as the Chiefs already traded their 2010 seventh-rounder to Miami last April.

This trade, regardless of the compensation, is good business for Miami. Neither Alleman nor Ndukwe were going to make the Dolphins'  53-man roster. Both players were running with the second unit, Alleman at left guard and Ndukwe at right tackle. So the Dolphins get something for players they were going to cut.

The trade also speaks to the team's commitment to Shawn Murphy and his improvement in the past year. Remember that last year, even as Murphy's rookie season advanced, both Ndukwe and Alleman played ahead of the fourth-round pick. But Murphy got in the weight room, changed his body, as Tony Sparano likes to say, and moved ahead of both rivals.

Murphy has assured himself of a roster spot on the team. His role as a backup at either guard spot is solid. Brandon Frye's chances of making the team also increase today.

Sean Smith and Jason Allen, both of whom missed the Carolina preseason game after being tested for swin flu, are back at practice. Smith will be working with the first-team defense at right cornerback, according to a source.

That means Smith didn't lose his starting job while being away and Vontae Davis played well against the Panthers in his place.

Finally, Matt Roth, who missed all of training camp with a mysterious groin injury, is still not practicing.

I remind you that today is the first day practices are closed to the media with the exception of the first 30 minutes. That means there will be no play-by-play of what's happening. But here's a clue: The Dolphins will be installing their newer version of Wildcat in the coming weeks, behind closed gates.

[BLOG NOTE: Players and coach Tony Sparano will be available to the media after practice. Check back here later for their words of wisdom. Also, follow me on twitter for the real-time updates.]