Desmond Jennings (OF, Rays) – 32% owned.  I recommended him a bunch of weeks ago, when I thought the call-up was imminent.  It wasn’t, but the Rays finally bit the bullet this past Friday and called up their top prospect.  And his first two games were a glimmer of things to come – back-to-back 2-hit games with a stolen base in each.  He’s got a single, two doubles, a triple, and two steals.  He’s probably gone in most keeper leagues, but he can have quite an impact at the top of that Rays lineup.

Danny Valencia (3B, Twins) – 28%.  He’s fifth among all third basemen with 20 RBI over the past month, and his .234 average belies a very solid July, in which he’s hit .288 with an .813 OPS.  If he can figure out how to hit righties (.579 OPS against righties versus a .936 OPS versus lefties), he’ll be a big-time sleeper next season.  Even now, as an incredibly thin position just got thinner with Adrian Beltre going down for three weeks, Valencia is worth a look.

Nyjer Morgan (OF, Brewers) – 18%.  Here’s a guy whose stock could plummet this week (if the Brewers acquire an outfielder)…or skyrocket (if the Brewers stand pat).  With Carlos Gomez likely out for the season, Nyjer is the every day center fielder, and is acting like its 2009 all over again.  He’s hitting .327 with 31 runs, 23 RBI and 6 steals, in not even 200 at bats.  He’s raised his OPS to .833 and will be given lots of opportunities to score and drive in runs in that Brewers lineup.

Edward Mujica (RP, Marlins) – 7%.  Earlier this week, Marlins manager Jack McKeon told reporters that if Leo Nunez is traded (which everyone expects him to be), Mujica will get first crack at saves for the Fish.  After a miserable April, he’s been nearly unhittable (except for his last outing) with a .215 BAA and a .88 WHIP.  Even with the recent bad outing, he’s holding hitters to a .152 BAA and sports a .60 WHIP in July.  Be sure to have him on your watch list in case Nunez goes to a contender.

Mike Adams (RP, Padres) – 39%.  Undoubtedly the best setup man in baseball, Adams has been spectacular for four straight years now.  It’s almost a lock that the Friars will deal Heath Bell, and when they do, Adams will close.  Of course, Adams may be dealt too, but less likely.  Adams is so good that it’s not even worth looking at only 2011.  In 282 career innings, he has a 2.13 ERA, 1.01 WHIP, an obscene .195 BAA, and 291 strikeouts…but only two saves (one as a Padre this year, one as a Brewer in 2005 before he learned the cutter that makes him so good).  He’s worth owning regardless, but especially if he becomes the closer.

AL Only Special – Alex Cobb (SP, Rays) – 6%.  Acquitting himself quite well with seven shutout innings yesterday against the Royals, the Rays’ rookie starter has forced the organization’s hand and will go with a 6-man rotation for now.  In his first turn through the majors, he’s 3-0 with a very good 2.57 ERA and 1.21 WHIP.  He’s made seven starts (including one against the Yankees and one against the Rangers), and hasn’t allowed more than 3 runs since his debut on May 1.  Any starting pitcher is worth a look; Cobb is worth owning.

NL Only Special – Kenley Jansen (RP, Dodgers) – 5%.  Although Javy Guerra is now locked into the closer role and is not a candidate to be dealt, Jansen is worth owning.  His K/9 is an astounding 14.82, and he hasn’t given a run – earned or not – since May 28.  In the thirteen innings he’s thrown since then, he’s allowed two hits (his BAA is .184 this season), no runs, 3 hits, 7 walks (like Carlos Marmol, his Achilles heel), and struck out 21 batters.  He was horrid in April, mediocre in May, and has been positively lights out for two months.  Though not a saves guy, his K’s alone make him worthy of a roster spot.

Written exclusively by Jesse Mendelson for www.thefantasyfix.com.  And lo and behold, Jesse joined Twitter.  Follow him @jessemendelson immediately. 

(February 25, 2010 – Photo by Nick Laham/Getty Images North America)