I've been thinking about our rotation, and although Padilla will be back shortly, Haeger was recently injured. I know how Ely has been amazing, Bills and Clay have also done pretty well, but instead of bringing back Haeger to round out the 5, why not sign Dontrelle? I mean, if you check his numbers (I know, yeah, yeah, numbers aren't everything) from the National League when he played in Florida, which are listed below, he was unstoppable.
2003 - 160.2 IP, 14-6, 3.30 ERA, 1.28 WHIP
2004 - 197 IP, 10-11, 4.02 ERA, 1.38 WHIP
2005 - 236.1 IP, 22-10, 2.63 ERA, 1.34 WHIP
2006 - 223.1 IP,12-12, 3.87 ERA, 1.42 WHIP
2007 - 205.1 IP, 10-15, 5.17 ERA, 1.60 WHIP
As we all know, the National League isn't as strong as the American League, and one can make the case that the Dodgers NL West opponents (SD, Colorado, SF and Arizona) may be stronger than the Tigers AL Central opponents (Twins, Indians, Royals, White Sox), a move back to the National League may do him well.
Another precedent is Roy Halladay. Although it isn't a very precise precedent to use, as I saw him pitch while in Toronto, and his stuff has always been consistent, he's been pretty 'monster' this season so far, with a move from the AL to the NL.
A return to the National League may do Dontrelle Willis good. A clear upgrade over Haeger, as he's younger, and has more upside. And, well, jeez, I'm really tired of the knuckleball.