Fantasy: It's now critical to assess what you have

Assessing the players on your fantasy baseball team becomes critical at this time. Some players are off to great starts and regression is around the corner. Others will continue to thrive. Some are off to miserable starts, but productivity is imminent. Here are some players of note.

Ubaldo Jimenez (Rockies, SP): He's real and spectacular. Jimenez has been improving each year and has some of the best stuff in the majors. He has yet to allow a home run, but gave up just 13 last season in 218 innings because he induces so many ground balls. A Cy Young contender.

Colby Lewis (Rangers, SP): Lewis spent the last two years in Japan and has become a different pitcher after struggling with a 6.71 ERA in the majors. A 10.24 K/9 and good control in his last four starts show Lewis is someone to own in mixed leagues, even if he gets hurt by home runs in the Texas heat.

Gavin Floyd (White Sox, SP): Floyd has been awful, but he hasn't pitched as bad as the 6.89 ERA. The concern is the 3.86 BB/9. If he can cut that, a high .385 batting average on balls in play (BABIP), low strand rate of 58.4 percent and a 4.03 fielding independent pitching (FIP) indicate better days are ahead.

Andre Ethier (Dodgers, OF): Ethier is coming off a 31-homer, 106-RBI season, while hitting just .194 against lefthanders, yet still went undervalued in a lot of drafts. He has 10 home runs in 97 at-bats, is striking out less and is batting .387 in 31 at-bats against lefthanders, although it's a small sample. Surpassing last year's numbers is possible.

Vernon Wells (Blue Jays, OF): He was written off by many and became a good value. Injuries have slowed him the past few seasons and he's driving the ball much better, but if someone thinks he's back to his 30-homer days, deal him.

Juan Pierre (White Sox, OF): Pierre is batting just .227, but he continues to run whenever he gets on base with 15 stolen bases in 19 attempts. He has a .240 BABIP, but his career average mark is .314. If you need speed, get him cheaply before it's too late.

Carl Pavano (Twins, SP): Pavano had a 5.10 ERA last season, but actually pitched better than that with a 4.00 FIP. He is off to a good start, yet many still don't believe in him. Pavano has a 3.43 ERA, 6.86 K/9 and a 1.37 BB/9 and even if the ERA increases slightly, the former Yankee can help your team.

Vladimir Guerrero (Rangers, DH): Guerrero is coming off his worst season, but chalk that up to injuries. He's healthy and being the DH should help him stay that way. Hitting in the middle of the Rangers' lineup is a boost and a .340 average, five home runs and 23 RBIs is no fluke.

Francisco Liriano (Twins, SP): The velocity has increased on his fastball and he is inducing ground balls at a rate of 54 percent along with a 36/13 K/BB ratio in 36 innings. He's back.

All statistics through Thursday.