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Here are five guys to seek out on your fantasy baseball waiver wire heading into the last week of April.

5. Colorado Rockies SP Jon Gray

Gray made his season debut on Friday night, with some expected good (10 strikeouts) and bad (five runs allowed in five innings) along the way. Making roughly half his starts at Coors Field isn’t ideal, but most of the other parks in the NL West are pitcher-friendly. If Gray can continue to register strikeouts at a high level, there’s definite mixed league potential here.

Yahoo! Ownership: 4%

4. San Diego Padres SP Drew Pomeranz

Through three starts this season, Pomeranz has a 2.04 ERA and 25 strikeouts over 17.2 innings. Based on his history there’s increased injury risk, but as long as Pomeranz is healthy and has a spot in San Diego’s rotation he’s worth carrying on a mixed league roster.

Yahoo! Ownership: 47%

3. Arizona Diamondbacks OF Yasmany Tomas

Tomas is off to a very nice start this year, hitting .279 with three home runs, nine RBI and 10 runs scored entering Sunday. Add in multi-position eligibility, with 31 games at third base in 2015, and you have a fantasy asset.

Yahoo! Ownership: 41%

2. Washington Nationals SP Tanner Roark

Facing the wiff-prone Minnesota Twins was a factor, but Roark’s 15-strikeout performance on Saturday was fantastic. His four starts so far this season have been an equal mix of good and bad, but I’m betting on Roark becoming more consistent and now is the time to add him.

Yahoo! Ownership: 16%

1. Kansas City Royals OF Jarrod Dyson

Dyson returned from an oblique injury last Tuesday, and he has a hit in four of five games (5-for-15, with one RBI, one run scored and two stolen bases). Based on speed alone, and a regular spot in the Royals’ lineup, Dyson is well worth a fantasy roster spot.

Yahoo! Ownership: 25%