It is interesting to note the decline of Mark Teixeira at the plate over the years. Tex may be lucky that A-Rod takes the spotlight off him. Take a look at the numbers:
2008 Age 28 Angels - 1.081 OPS
2009 Age 29 Yankees - .948 OPS (12.3% YR/YR decline)
2010 Age 30 Yankees - .846 OPS (10.8% YR/YR decline)
2011 Age 31 Yankees - .835 OPS (1.3% YR/YR decline)
2012 Age 32 Yankees - .807 OPS (3.4% YR/YR decline)
Teixeira has been declining every year. He's approaching replacement level with his bat. At his rate of decline he'll probably reach replacement level in 2014 but here's the thing (actually three things) - Teixeira is a notoriously slow starter. If he gets off to a slow start in 2014 will his fans or even Yankee management still show him the encouragement he might need to get going? Kevin Youkilis got off to an awful start in 2012 and he really couldn't turn it around till he was shipped out of town. Teixeira is under contract by the Yankees until 2016. He will make $22.5 million per year for every year until his contract expires.
As a Red Sox fan - the cherry on top is the fact that the Angels used the compensation pick from the Yankees for signing Teixeira to draft Mike Trout.