Tampa Bay Lightning right wing Ryan Callahan (24) skates during warm ups before an NHL hockey game against the Buffalo Sabres Thursday, March 6, 2014, in Tampa, Fla. Callahan was acquired by the Lightning in a trade with the New York Rangers for Martin St. Louis. (AP Photo/Chris O'Meara)

Tampa Bay Lightning right wing Ryan Callahan (24) skates during warm ups before an NHL hockey game against the Buffalo Sabres Thursday, March 6, 2014, in Tampa, Fla. Callahan was acquired by the Lightning in a trade with the New York Rangers for Martin St. Louis. (AP Photo/Chris O'Meara)