Here's the history of the series (SDSU leads 10-5)
Home team listed second
1942: YSU 14, SDSU 0
1968: SDSU 23, YSU 20
1969: YSU 17, SDSU 16
1972: YSU 22, SDSU 34
1973: SDSU 26, YSU 6
1974: YSU 35, SDSU 21
1975: SDSU 38, YSU 21
1979 D II PLAYOFF GAME AT YSU: SDSU 7, YSU 50 (Ouch!)
In the modern era, here are the results:
2007: SDSU 17, YSU 23
2008: YSU 7, SDSU 40
2009: SDSU 17, YSU 3
2010: YSU 20, SDSU 30
2011: SDSU 35, YSU 28
2012: YSU 28, SDSU 41
2013: SDSU 42, YSU 13