The Bulldogs, however, posted their most hits in WAC play but four errors, seven walks and three hit batters cost Tech (17-23, 4-12) in the loss to the Spartans 32-12, 10-6).
The teams continue the series at 4 p.m. on Saturday.
Tech led 4-0 after three innings as Dan Preaus and Kyle Humphreys both smashed two-run home runs for the Bulldogs.
After looking very good the first two innings, Tech starter Lee Gwaltney (3-8) struggled the rest of the night pitching five and two-thirds innings while allowing eight hits, ten runs (6 earned) and striking out eight.
All but one Tech starter had a hit and Nick Cauley tied a career high with four hits in the game.
The Spartans used two big innings to take control of the game. San Jose State scored four runs in the fourth to tie the game at 4-4 and after Tech reclaimed a 6-4 lead the Spartans erupted for six runs in the sixth to take the lead for good.
Markum King gave the Spartans the lead good with a three-run home run to left in the sixth inning. King did not start the game but had four RBIs in the contest.
Tech took a 6-4 lead in the fourth inning with two runs with two outs. Brandon Haygood hit a home run and then later in the inning Cullen Simmons singled in a run.
Andy Cook (2-2) earned the win in relief by pitching five and one-third innings and allowing eight hits and two runs.
Mike Mallott started the game for San Jose State and allowed five runs in three and two-thirds innings.