Halsted helped the No. 1 men's soccer team to a pair of wins last week, ending a perfect regular season for the Cougars.
He made five saves in a shutout win over Finger Lakes CC and stopped three shots in a 3-1 road win at No. 5 Herkimer College.
Genesee finishes the regular season 17-0 and will now move on to the Region III tournament.
Modesto led the GCC volleyball team to a perfect 5-0 week last week with strong play in each of the Cougars' matches.
She had 23 kills and 10 digs in a five-set road win at Finger Lakes CC and totaled 36 kills, 27 digs, seven blocks and five aces in three wins at the FLCC POD event.
Genesee (28-7-2) will compete in the WNYAC tournament this Saturday at Monroe CC.