The Diamondbacks fired former 2007 Manger of the Year Bob Melvin and are expected to replace him with A.J. Hinch, who is the club’s vice president of player development.

The 47-year-old Melvin’s firing comes after a disappointing start by the Diamondbacks, who entered Thursday 8½ games behind the Los Angeles Dodgers in the NL West. Melvin, who went 337-340 in four-plus seasons, had one year left on a contract he received after being the 2007 NL Manager of the Year.

Melvin’s stock rose when he guided a youthful but talented group to the NL West title two years ago. He was dismissed because many of the same players have failed to live up to expectations based on that season, when the Diamondbacks posted an NL-best 90-72 record despite being outscored by 20 runs across the season.

Speculation about Melvin’s future grew with every 1-2-3 inning by the Diamondbacks’ hitters. Arizona entered Thursday with a .225 batting average, by far the worst in baseball.

Arizona’s offense was a major question mark coming into the season, but as long as the pitching came through the D’Backs were expected to compete in a weak NL West. But Brandon Webb’s shoulder injury (and subsequent trip to the DL) was a crushing blow to the club’s starting pitching and the offense has been even worse than expected.

Melvin can’t do anything about Webb’s injury, Conor Jackson hitting .191 or Eric Byrnes averaging a paltry .139. But the reason he was inevitably fired is because the club has lost all emotion. It’s only May and the D’Backs are playing like it’s August and they’re 15 games out of first. Maybe the 34-year old Hinch can breathe some life into a club that certainly has talent, but is currently lacking any kind of desire.

It’s hard to believe the start of baseball season is next week. It seems like a very short time ago when the Phillies and Rays were playing a Game 5 of the World Series in frigid Philly, having to suspend it and pick up the next night. It seemed like nothing was going to stop that Phillies team, much to the dismay of this Mets’ fan. Anyway, it’s a fresh start and a clean slate and a whole lot of possibilities. Here are a few of those as I see them…

NL MVP: David Wright, New York Mets—Am I playing homer? Yes. But this kid works really hard every off-season and consistently puts up big numbers, and he hasn’t even come close to showing his potential. This year Wright is going to show the world why the Mets have built their franchise around him, and he’s going to (finally) lead them to a World Series.

AL MVP: Grady Sizemore, Cleveland Indians—Last year, Sizemore had a full season low batting average of .268 but racked up career highs in home runs (33), RBI (90) and stolen bases (38). Last season Sizemore finished 10th in the AL MVP voting but like Wright, he is on the verge of something huge, and he’s going to lead the Indians to the playoffs.

NL Cy Young: Tim Lincecum, San Francisco Giants—I love a good short-guy-kicks-ass story, the kind where most scouts write someone off because of their size (5’10, 160 pounds), and then they go and prove everyone wrong except the team who drafted them. That’s Tim Lincecum, who won the NL Cy Young last season for the Giants, winning 18 of his team’s 72 wins, or ONE QUARTER of them. His stuff is absolutely sick, and at times just unhittable and he will coast to his second straight Cy Young.

AL Cy Young: Daisuke Matsuzaka, Boston Red Sox—Last season, Dice-K went 18-3 but was largely overshadowed by Cliff Lee’s 22-3 masterpiece as well as by K-Rod’s record-breaking 62 saves. But this guy has taken over as the dominating shutdown starter in Boston after Josh Beckett battled inconsistency last year, and this year he’s going to roll to the Cy Young.

NL Rookie of the Year: Micah Hoffpauir, Chicago Cubs—Last season, during the second straight historic collapse by the Mets, Hoffpauir was Babe Ruth for one game, going 5 for 5 with two home runs and five RBI. That was his only multi-hit game, but you don’t just have a showing like that by accident.

AL Rookie of the Year: David Price, Tampa Bay Rays—Sure, the Rays optioned their young phenom to the minors recently, but don’t let that fool you. Once Price logs a few innings, he’ll be back in Tampa blowing hitters away the way he did in the ALCS against Boston last season. And he’ll find himself as the #2 or #3 starter before long.

NL Manager of the Year: Jerry Manuel, New York Mets—When Willie Randolph was let go in New York last season, the Mets were 34-35. After Manuel replaced him, the Mets went 55-38 the rest of the way. Okay, they choked again down the stretch, but this year it’s Jerry’s team from the start, and he’s going to show everyone that his no-nonsense and player-friendly approach can win lots of games, as well as championships. It doesn’t hurt that he has two lights-out closers (K-Rod, JJ Putz) anchoring his bullpen now.

AL Manager of the Year: Eric Wedge, Cleveland Indians—The Indians missed the playoffs last season after taking the eventual champion Red Sox to 7 games the year before. The Tribe plays well in odd numbered years as of late—going 93-69 in 2005 and 96-66 in 2007. This season, with the additions of Kerry Wood, Mark DeRosa and Carl Pavano, Cleveland is going to surprise a lot of folks.

NL Comeback Player of the Year: Eric Byrnes, Arizona Diamondbacks—Byrnes was way off his career averages in 2008, hitting a paltry .209 with 6 homers and 23 RBI. He has nowhere to go but up, and this season I have a feeling Byrnes’ numbers are going to match his intensity on the field.

AL Comeback Player of the Year: John Smoltz, Boston Red Sox—After season-ending shoulder surgery in June of 2008, the Braves finally let one of the cornerstones of their franchise go, as the free agent pitcher signed with the Sox. He won’t see the mound until June, but Smoltz threw in the bullpen this week and showed no signs of pain. He’s going to make the Braves sorry—really sorry.