The Washington Nationals have gotten a much-needed boost from veteran right-hander Jeremy Hellickson. In six starts (32.2 innings), he has a 2.20 ERA, 2.80 FIP and a 3.29 xFIP -- all terrific numbers. Opponents are hitting a mere .198 against him, and with a WHIP of 0.86, he's walking almost no one this season (4.1% walk rate).

That's all great, and Hellickson has had good seasons in the past. In 2016 with the Philadelphia Phillies, he pitched 189 innings and put up a 3.71 ERA in 32 starts with a 20.0% strikeout rate and 5.8% walk rate. However, last year, he was one of the worst pitchers in baseball, posting a 13.8% strikeout rate, 5.43 ERA and 5.77 FIP.

Even if Hellickson is able to replicate the season he had two years ago, the results he's shown thus far are certainly unsustainable. He doesn't strike out a lot of guys out (21.5% strikeout rate this year), and his .198 batting average allowed is boosted by an unsustainably-low BABIP of .239.

Use this incredible start by Hellickson to find a buyer now before the regression kicks in.