FOXBOROUGH -- There's bulletin board material. Then there's billboard material.

Clear Channel Outdoor has put up a billboard on Rte. 93 north on the Medford/Stoneham line, and on Rte. 495 in Lawrence, that's surely going to get some attention in Baltimore and beyond.

The billboard promotes Ravens linebacker Ray Lewis's retirement party that may take place at Gillette Stadium Sunday night if the Patriots are victorious.

Clear Channel has been tweeting about the billboard today:

Here's the countdown to Ray Lewis' retirement party at Gillette Stadium on Sunday. No more games after loss to Pats. twitter.com/MassBillboards — CCO_Boston (@MassBillboards) January 16, 2013

Hopefully, the Patriots come through on their end of the deal, otherwise this billboard will come down in a hurry.