I would consider him a must-add in NL only leagues.
In mixed leagues, he would be worth a look if you are in need of power. The Pirates have screwed him around for years, if getting regular PT in St.Louis I would expect numbers approaching his 2004 totals- .264 Avg, 97 RS, 29 HR, 89 RBI.
"People ask me what I do in the winter when there's no baseball. I'll tell you what I do. I stare out the window and wait for spring."-- Rogers Hornsby