William Eklund scored 39 seconds into overtime, Mackenzie Blackwood made 27 saves and the San Jose Sharks ended the Washington Capitals’ winning streak at four by beating them 2-1.

The Capitals’ clash Tuesday night against San Jose had all the makings of a trap game — Washington was riding a four-game winning streak that had featured high-octane offense every night while the upstart visitors had shaken off a poor start to play inspired hockey for more than a month.