This just in from the Associated Press:

AT&T says it will no longer sponsor Tiger Woods, joining Accenture and Gillette in dropping support for the golfer after numerous allegations of infidelities. AT&T Inc.'s logo appeared on Woods' golf bag, and has been the title sponsor of a PGA event in July with Woods as the host.

Yesterday was Tiger's 34th birthday. As Frank reported Tuesday, some economists think Tiger's troubles have cost his sponsors $5 billion to $12 billion in lost market value.

Update at 10:50 a.m. ET. Bloomberg News adds this statement from AT&T:

"We are ending our sponsorship agreement with Tiger Woods and wish him well in the future," Michael Coe, a spokesman for AT&T, said in an e-mail today.