Update: More on this trade here.
I'm leaving town for the weekend in 20 minutes, so only a little time.
Rolen's long been an outstanding talent, with a great bat and brilliant glove. He's also been someone who has a hard time staying healthy, which hurts his value. He's had a WAR of 2.5, 3, and by this season's end 3.5 to 4. I think it's safe to call him a 2.5-3 WAR player next year. That's worth somewhere around $11-15 million next year. He's paid $11M next yea, so it's fair value, possibly with a small surplus up to $4 M depending on the market.
Eddie has been a 1.5-2 WAR player, but might be lucky to post 1.5 WAR this year. I'll call him 1.5 WAR for next year. Hitting-wise, he's valuable. But the fielding kills his value, and I've long since given up hope he'll get much better. Eddie makes 4.75 M next year in his final arbitration year, while his value should be in the $5.5-6.5 range (again, depending on market).
So, if it was a 1:1 trade, it'd favor the Reds slightly, I think--we take more salary, but upgrade talent and (probably) get a larger surplus.
The question now is who the minor leaguer is. Alonso is a top-25 hitter, I think, which puts his value at ~$25 M. (if just top-50, $23 M). That would swing the deal in a HUGE way to Toronto. Latest reports are that he's not included.
Zach Stewart I don't know how to rate. If he's a top-100 pitcher, he's ~$10 M. Grade B, he's $7 M. Either way, favors Toronto, though not as bad as initial reactions...only by a few million or so. Roenicke is maybe another 1 WAR, which is ~$4.5 WAR.
So yeah, I think Toronto wins by $6M in value or so. Not a disaster, but not good. I don't like this deal. Rolen's old, still a good player, but he's not going to make this team a contender next year. And how much longer will he play? Will he be healthy?
Have to run. :(