On Deck: For Those About to Rock

On Deck is FanHouse's look at the day's most intriguing baseball matchups.

Florida Marlins (44-43) at Colorado Rockies (37-51) - 3:05 PM ET

As if 18-17 wasn't enough, the Rockies and Marlins played a 12-6 game proving once and for all that the humidor is dead Coors Field can still play host to some Nintendo games ... and that the Marlins pitching staff needs to step it up if they're going to hope to remain in contention for the N.L. East. The Marlins turn to Mark Hendrickson, who started out the season pitching like their ace but has been positively awful his last seven starts (37 earned runs in his last 34 innings). Not the guy you would expect to bounce you back from giving up 30 runs in two games. As for the Rockies, hey ... if they have another run in them, they're only six games back in the N.L. West so that division can still be had. Speaking of which ...

Los Angeles Dodgers (42-45) at San Francisco Giants (39-49) - 4:05 PM ET

Nice of the Arizona Diamondbacks to not make their early season party an exclusive one, as they've pretty much let everybody back in the race, including these two teams. A team like the Giants, at ten games below .500, has no business being in a divisional race. Yet they're four games back of the N.L. West lead making this rivalry game between them and the Dodgers even more important, as Frisco has a great chance to move to within three games of the lead with Matt Cain headed for the hill.

New York Mets (41-46) at Philadelphia Phillies (52-34) - 1:35 PM ET

The question, as always with the New York Mets when Oliver Perez's turn comes up in the rotation is this: which Oliver Perez will rear his head? The one that went seven innings giving up only one run in his last start against the Yankees? Or the one who can't get out of the second inning (13 combined runs in two innings against the Giants and Pirates)? New pitching coach Dan Warthen made some adjustments with Perez;s delivery before his last good start ... let's see if Perez can finally put his immense tools to good use for a few starts in a row.

Everyone else:

• Nationals at Reds 1:15 ET
• Rangers at Orioles 1:35 ET
• Astros at Braves 1:35 ET
• Royals at Rays 1:40 ET
• Athletics at White Sox 2:05 ET
• Pirates at Brewers 2:05 ET
• Indians at Twins 2:10 ET
• Cubs at Cardinals 3:15 ET
• Blue Jays at Angels 3:35 ET
• Padres at Diamondbacks 4:10 ET
• Tigers at Mariners 4:10 ET
• Red Sox at Yankees 8:05 ET