Mason, 37, ranks first in the Ravens' existence in catches (471) and receiving yards (5,777). Heap, 31, is the Ravens' all-time leader in receiving touchdowns (41) and is second in receptions (467) and receiving yards (5,492)."It's part of the business," center Matt Birk said. "You're surprised, but you're not. It happens every year to guys. It's part of our game that is unfortunate for a lot of reasons. But the salary cap is a big reason why our game is so competitive and popular. Hopefully, the Ravens can find a way to re-sign them, but all of those guys will land on their feet somewhere."