As May wraps up, major league teams are evaluating their season thus far and making decisions on whether to build for the future or try to win now. Those decisions can have a big impact on your fantasy team should one of your key players get shipped to a new team. Here’s a look at a few of the trade possibilities being talked about:

Roy Oswalt, Houston Astros
Perhaps no other ace pitcher is suffering as much this season from a lack of offense. Well, San Francisco’s Matt Cain certainly has a similar complaint, but the Giants appear to be contenders for a division title. The Astros? They are contending for next year’s number one overall draft pick. That has made Oswalt’s efforts more of a waste. The star pitcher’s numbers are stellar across the board – the best they’ve been in years – except for a paltry 3-6 record. Rumors are that the Dodgers have inquired about Oswalt (and Cliff Lee, see below). If that deal were to happen, Oswalt’s numbers from pitching the majority of games in Dodger Stadium could be even better than they already are.

Cliff Lee, Seattle Mariners
The Mariners made several big moves in the off season and by most accounts were projected to battle for the AL West title. Thus far, they haven’t delivered. A meager offense and poor defense have buried the M’s in last place. Which makes holding onto Cliff Lee unlikely. Lee got a late start due to an injury coming out of spring training, but has generally pitched well. Only a recent bad outing blew his ERA past 3.00, but otherwise he looks like the same solid starter he’s been for years. Again, the Dodgers have made inquiries.

Carlos Lee, Houston Astros
The Astros are likely to be moving several players, and Lee is a guy they’d love to send packing as they gear toward rebuilding. Lee is currently batting below .200 – not exactly worthy of the $100 million six-year deal he signed in 2006. The Giants would certainly love to add a big bat if they could do so without trading any key pieces, but would  almost certainly expect the Astros to pay a significant portion of Lee’s salary.

Mark Buerhle, White Sox
If things don’t turn around soon for the White Sox, the manager and a few highly paid players could be gone. Buerhle is making $14 million and currently is 3-5 with an ERA pushing 4.50. Paul Konerko is also making a lot of money, but he’s met expectations with solid power numbers. So the likelihood is that Buerhle will draw interest from teams like the Yankees, who have gotten nothing from offseason acquisition Javier Vazquez, and perhaps the Dodgers and Red Sox, to name a few.

These are just a few of the names expected to  get a lot of interest before the trading deadline. You can add nearly anyone on the slumping Cleveland Indians as well.

A change of scenery could be just the tonic for some big name players who are struggling with their major league teams – and potentially a perfect fix for your Scoresheet fantasy team!