Rosenbaum hit a two-run home run to get the Cardinals on the board in the seventh inning and a single to lead off the ninth inning that eventually led to the game-winning run in a 4-3 win over Michigan.
"The home run was great but I was more proud about the base hit," U of L coach Dan McDonnell said. "Danny had an awesome day at the plate. He showed his toughness. He made the error (in the eighth) and he moved on."
The Cardinals (45-16) are now 2-0 in the regional and will play the Michigan-Bradley winner at 4 on Sunday. If U of L wins, the Cardinals advance into the Super Regional round.
Rosenbaum finished 2-for-4 with two RBIs and a run scored. He was replaced in the ninth inning by Colin Lyman, who eventually scored the game-winning run for the Cardinals.
"It was just an unbelievable feeling for me," Rosenbaum said. "I've had an up and down career for sure. It felt good to finally put my own little stamp on my career here and it's just exciting to help out team get a win. We have a lot of goals set for the rest of the season.
"I was just happy I could help us out."
Rosenbaum's other home run was also a memorable one, a solo shot in game two of the Florida State series earlier this month. It was his fifth career home run and his average this season is now .254.
"He seems like he's always battling to play," McDonnell said of Rosenbaum. "He had to compete with (Zak) Wassermann, who was a 6'6" senior, big first baseman who had a great senior year. Last year, we had an extra infielder or two and Grant Kay slid over there. Then you have the superstar freshman Brendan McKay come in and give you the at-bats. You have to give Danny a lot of credit.
He might not start everyday but he's right there in the mix. He's the face of our team. We talk about depth."