Fantasy baseball waivers and the acquisition of fantasy baseball free agents can make or break your season. Your fantasy baseball cheat sheets won't help you after spring training. If your team remains the same after opening day, you will have trouble competing in your rotisserie baseball league.

Do you need to replace your fantasy baseball busts? Which fantasy baseball players can you ignore? KFFL.com's Fantasy Baseball Diamond Market gives you fantasy baseball tips and insight to sort through the masses quickly.

Key

Middle infielders

Jamey Carroll, 2B/3B/SS, Los Angeles Dodgers

Carroll should continue to fill in for Rafael Furcal (back), who to no one's surprise ended up on the DL. It may not be serious, but who knows how long this will last?

Future bullpen venom?

Carroll's eligibility combined with his ability to get on base, score and thieve a base on occasion make him fantasy replacement material. Acceptable fill-ins are in demand, so Carroll may have to do, especially if you just lost Furcal.

Shallow mixed: Pass

Deep mixed: Consider

NL-only: Acquire

Pitchers

Sam Demel, RP, Arizona Diamondbacks

We've been through this. Arizona's bullpen is unstable. Demel picked up his first career major league save last night and is steadily improving, but let's remember a couple of things: Aaron Heilman pitched in five of the club's previous six games; Juan Gutierrez (shoulder) will be back soon.

Let's remember a couple of other things: Heilman and Gutierrez haven't been reliable for long stretches in the back end; Demel's 4.20 K/BB, solid grounder rate and modest left-on-base percentage suggest more hidden value is to come. Do you have the patience to see if Kirk Gibson will agree?

Shallow mixed: Watch

Deep mixed: Consider

NL-only: Acquire

Kyle Lohse, SP, St. Louis Cardinals

The Cards will activate Lohse (forearm) from the DL so that he can face the Chicago Cubs on Sunday. The right-hander has been far worse this year (5.89 ERA in nine starts) than he was last year (4.74 ERA, 23 games and 22 starts). It wasn't certain that he'd be able to return as a starter.

Lohse was effective in two of his three rehab outings and terrible in the other. That's Lohse. He's inconsistent, but consider that his forearm condition may have contributed to his poor performance prior to his DL stay. He had surgery and has rehabbed without incident.

There is room for Lohse's numbers to improve, and he's a better option than Jeff Suppan (groin). Don't write him off completely.

Shallow mixed: Pass

Deep mixed: Watch

NL-only: Consider