Joseph Eric Thornton (born July 2, 1979) is a Canadian professional ice hockey centre and alternate captain for the San Jose Sharks of the National Hockey League (NHL). He was drafted by and played seven seasons for the Boston Bruins before being traded to San Jose in 2005–06. An Art Ross- and Hart Memorial Trophy-recipient, both in his first season with the Sharks, his on-ice vision, strength on the puck, deft passing ability, and power forward style of play have led to him becoming one of the league's premier top line centres.