Jacobs, who improved his record to 5-0 this year, allowed just three hits in six innings of work on the mound as Auburn snapped its four-game SEC losing streak and improved its record to 7-7 in league games and 19-15 overall.
Auburn will try to win the series on Sunday when freshman lefty Daniel Koger, who is 2-2, takes the mound against 2-6 Kevin Ziomke.
Jacobs, who had been relegated to the role of midweek starter, got to pitch on Saturday after Will Kendall suffered an injury last week and was lost for the season.
Auburn head coach John Pawlowski had high praise for the senior right-hander. "You can't say enough about Jon Luke Jacobs," he said. "He got us into the seventh inning allowing three hits.
"Today was one of our better defensive games," Pawlowski said. "We had 13 groundball outs. Creede Simpson and Dan Glevenyak had some nice plays up the middle and then (catcher) Blake Austin threw out Tony Kemp."
Jacobs credited his teammates with making his assignment easier. "We needed to bounce back after last night and the way the last four conference games have gone for us," he said. "The defense played really well today and all around we played really well. We need to keep that rolling into tomorrow."
Cullen Wacker led the Tigers at the plate going 3-4 starting with a first inning double that scored two runs, giving the Tigers a lead they never surrendered.
Auburn stretched the lead to 3-0 in the fifth inning as Glevenyak scored on a groundout.
Ortman's task was made easier as the Tigers score two more runs in the ninth inning. Jay Gonzalez scored on a safety squeeze bunt by Glevenyak. Bobby Andrews scored on an error after stealing third for the final run of the game.