The Alumni have won the Sig Series for 1998-99, by a margin of 4 events to 2.
| EVENT | DATE | RESULTS |
| Sig Series I - Softball | Sept. 12th, 1998 | Alumni: 28, U-Grads: 3 |
| Sig Series II - Football | Oct. 10th, 1998 | Alumni: 14, U-Grads: 0 |
| Sig Series III - Basketball | Nov. 14th, 1998 | Alumni: 98, U-Grads: 50 |
| Sig Series IV - Bowling | Saturday, February 13, 1999 | Alumni: 2, U-Grads: 7 |
| Sig Series V - Hockey | Saturday, March 27, 1999, 12 Noon | Alumni: 7, U-Grads: 5 |
| Alumni win series 4 events to 1 | ||
| Sig Series VI - Bowling | Saturday, April 10, 1999 | Alumni: 6, U-Grads: 0 |
| Sig Series VII - Volleyball | June 5th, 1999 - after BBQ | Alumni: Forfeited (due to lack of UG players), U-Grads: 1 |