Washington posted 207-5 thanks to Australian stars Steve Smith (88 off 52 balls) and Glenn Maxwell (40 off 22).
SA-born USA international Andries Gous chipped in with 21 off 14 delivers while Obus Pienaar scored 13* off nine.
Jansen then took 3-28 in his four overs as San Francisco were bowled out for 111 in 16 overs.
Photo: MLC
