Santana to the Mets?

Sports Illustrated is reporting that Johan Santana will end up on the Mets.

This is obviously huge for the Mets. Life's a lot easier with a #1 starter in the rotation.

Also I think it's crushing for the Yankees. As I've said before, the staff was bad last year. As of now, their 2008 rotation is

Wang (3.70 ERA, a solid #2 starter)
Pettitte (4.05 ERA last year; #3 starter)
Mussina (5.15 ERA last year; a #4 starter at best)
Kei Igawa (67 innings pitched in major league baseball)
and choose among
Phil Hughes (72 innings pitched in major league baseball)
Joba Chamberlain (24 innings pitched in major league baseball)
Ian Kennedy (19 innings pitched in major league baseball)

Pettitte and Mussina are on the downward slopes of their careers. There's a lot of potential among the bottom three guys, but still. Unless the Yankees want to destroy their careers, none of the last three guys is throwing 200 innings next year. They could stay in the bullpen all year, but it seems very unlikely that any of them will make any playoff starts.

The Yankees *needed* Johan Santana. If the Mets end up with him, the Yankees must get someone else to start, right?