Parker McFadden went first, followed by Scotty Sunitsch, Ryan Walker and Justin Harrer.
Bullpen trouble doomed the Cougs, who saw two late leads slip away.
With bad weather expected, Sacramento State will stay home.
Three losses to start the season have been followed up by a pair of wins. The Crimson Tide are on deck.
The Cougars will try to salvage the series today in the season finale.
Four walks issued in the ninth inning helped the No. 1 Beavers come back to beat the Cougs 4-3
The Cougars, 8-4 over their last four series, will get the ultimate test against the No. 1 Beavers.