Costanzo was also a member of the Buffalo Bills, Cleveland Browns, San Francisco 49ers, and Chicago Bears.

Against the Holy Cross Crusaders, he made 12 tackles, forced a fumble, and blocked an extra point.

[1] Costanzo was signed as an undrafted free agent by the New York Jets in 2006, and was on the practice squad until 2007.

[2] Costanzo was notable for forcing a fumble in the 2011–12 NFL playoffs against the New Orleans Saints on a kickoff and recovering another, en route to a 49ers 36–32 victory.

[5] General manager Phil Emery commented, "Blake has done some dynamic things as a special teams player, as is evident from his four forced fumbles with one of them in a playoff game against New Orleans this past year.

[8] Source Retrieved on September 2, 2014 He is currently an assistant coach at Paramus Catholic High School (New Jersey).