While it doesn't always promise great hitters, the waiver-wire is constantly chock-full with pitchers that can help take your fantasy baseball team to the next level.
Here are four pitchers that are widely available that you should snatch up.
(All percentages are from ESPN fantasy baseball leagues)
Alfredo Aceves: Boston Red Sox, RP (63.1% owned)
Aceves hasn't notched a save since April 28, but that doesn't mean he should be left on the wire. He's entrenched in the closer role, and has been pitching great after a horrific start to the season. In his last nine innings pitched, he's given up only one run and three walks, while striking out 13 batters. And Aceves' 3.10 ERA and 1.11 WHIP are evidence he should continue being very effective. Pick him up now, because when the Red Sox start winning some games and the saves start to come, he'll be long gone.
Ervin Santana: Los Angeles Angels, SP (49.6% owned)
Fantasy owners were expecting big things from Santana this year after a 2011 campaign in which he struck out 178 with a 3.38 ERA and 1.22 WHIP. But Santana had a rough start, giving up five runs in three of his first four starts. And just as owners started to give up on Santana, he turned it around. He's pitched at least seven innings in each of his past three starts, allowing only seven runs and striking out 14. Ervin's back to being his old self, and that guy is too good not to be owned.
Ross Detwiler: Washington Nationals, SP (54.9% owned)
Detwiler has been one of many Nationals pitchers off to a great start. He has won three games and currently sports a 2.10 ERA and 1.02 WHIP. And Detwiler was effective last season, posting a 3.00 ERA and 1.26 WHIP. He doesn't pitch very late in games, having not surpassed 6.1 innings in any of his starts, so his wins may be limited. But his ability to keep his ERA and WHIP low make him valuable.
Jake Westbrook: St. Louis Cardinals, SP (67.5% owned)
Westbrook has been excellent in his first six starts of 2012, allowing only eight earned runs in 41 innings with a 1.07 WHIP. He has a career ERA of 4.27, so it's unlikely his ERA stays under 2.00 much longer. Still, that doesn't mean his early season success is a product of luck. Westbrook is in much better shape this year, having lost around 25 pounds before the season. Also, the Cardinals have one of the best offenses in all of baseball, currently ranking 2nd in runs and batting average. Worst-case scenario, Westbrook is simply a solid source of wins.