Looking to sell high? Read on to find out which players won't keep this up.

Justin Morneau has been an RBI machine in 2013; do his skills suggest any HRs on the horizon? Also, Cain, Moustakas, Phelps, Straily.

Finding good starting pitching in a deep league isn't easy. But several guys like Craig Stammen and Corey Kluber are probably on your waiver wire. Here's why you shouldn't ignore them.

Several rookies take the forefront this week. Where to jump in, and where to stand back?

Matt Carpenter had 33 extra-base hits in a part time role last year, helping make him a popular draft day choice, especially in NL-only leagues. Has he met expectations? Plus Jeff Locke, Jonathan Lucroy, Scott Feldman and Didi Gregorious.

Jacoby Ellsbury has had trouble living up to his epic 2011—can he do it this year? Also Tillman, Y. Escobar, Keppinger, Grimm.

ARI, BOS, CHC, DET, HOU, LA, SD pens. For some of these, the saga continues.

Is the 5.00 ERA the new reality for Matt Cain? Plus Miguel Montero, Everth Cabrera, Carlos Quentin and Tony Cingrani.

The time for patience is over. Let's look at some of the young season's underachievers.

Will Mariano Rivera continue to provide vintage value in his farewell season, or will age finally catch up with him? Also, Melkly Cabrera, Eric Hosmer, Brandon Morrow and Manny Machado.

Tim Lincecum's gradually eroding fastball velocity and lack of movement on his pitches have combined to make his sub-3.00 ERA profile a distant memory.