John Lannan's made the Fangraphs "Stock Down" list. But I cite Fangraphs too much.
http://www.fangraphs.com/fantasy/index.php/stock-watch-823xFIP is fielding independent pitching, which focuses on home runs, Ks, and BBs, applies average fielding to balls in play for conversion to outs (GB, FB, Liners, pops, etc...), and normalizes the home run per fly ball to average for the league rather than using the player's. I believe there are also ballpark adjustments. Let's just say it tries to isolate the pitchers performance from his fielders and the park.
John Lannan, Nationals
Lannan’s ERA in 2008 (3.91) was considerably lower than his XFIP (4.47), and he has outdone his XFIP again this season (4.03 ERA, 4.74 XFIP). However, the gap is closing, with the lefty getting drubbed for 19 runs in 18 August frames. He has issued 11 walks, while punching out nine batters.
The 24 year-old boasts above-average control (2.97 BB/9 in 2009) and groundball tendencies (51.3 GB%). However, his strikeout rate has dipped from slightly below average in 2008 (5.79 K/9) to an untenable 3.75 per nine frames. Compared to last season, hitters are chasing fewer of his pitches (26.1% in ‘08, 21.3% in ‘09; 25% MLB avg.) and are making more contact (83.1 contact% in ‘08, 89% in ‘09; 80.6% MLB avg). He’s certainly a serviceable back-rotation hurler, but Lannan is more of a 4.50 ERA+ guy than the high-3, low 4 ERA pitcher that we have seen so far.