FC Dallas exchanges Blas Perez for Whitecaps' Mauro Rosales

FC Dallas forward Blas Perez (7) misses a goal against Portland Timbers goalkeeper Adam Kwarasey (12) and defender Jorge Villafana (19) during the second half of the MLS soccer Western Conference championship match Sunday, Nov. 29, 2015, in Frisco, Texas. (AP Photo/Brad Loper)FC Dallas made a veteran swap with the Vancouver Whitecaps by sending forward Blas Perez away in exchange for midfielder Mauro Rosales.

Perez's departure from FCD won't come as that much of a surprise to fans considering he tweeted out a goodbye back in December.

In Perez, FC Dallas gives up a 34-year-old Panamanian who scored five goals and an assist in five games last season. He had 36 goals and 14 assists in four…