Instead, Dwyer was pressed into action.
The circumstances under which Dwyer made his first-career Southeastern Conference start may not have been ideal, but he made the best of the situation.
"What you really hope when a kid gets an opportunity, whether it's playing defense in the ninth inning, a pinch hit or his first start in SEC play, is that he maximizes it and forces you to give him more opportunity," UK head coach Gary Henderson said. "And that's what you hope and that's what he did."
With UK on a two-game losing streak and in need of a Saturday-night win to even a crucial league series with Missouri, Dwyer stepped up. He tossed 6.1 shutout innings, allowing just six hits and a walk against a Tiger lineup that touched up the Wildcats for eight runs just a day earlier.
"I was just planning on attacking," said Dwyer, who found out Wednesday he would be making his SEC starting debut. "My approach was to go in there and attack, keep the ball low and let them hit on the ground, let my defense work for me."
Behind Dwyer, UK (23-12, 7-7 SEC) topped Missouri (16-17, 5-9 SEC), 12-0. Five different Cats had two RBI, led by A.J. Reed, who got the scoring going with a two-run home run -- his NCAA-leading 14th of the season -- in the fifth. Reed now has homers in five straight SEC games, making him the first player in the modern era of UK baseball to accomplish the feat.
"Especially in our conference, guys are going to come at you and it's just a matter of hitting the pitch when you get it," Reed said. "Like I said, right now I'm doing a pretty good job of that and not missing those pitches."
Reed narrowly missed out on a second home run, with his sky-scraping seventh-inning fly ball losing steam at the warning track.
"It's pretty impressive," Henderson said. "He's seeing it good right now, taking good swings and even when he swings and misses and chases a pitch he doesn't get out of his game, it doesn't speed up on him and he's at a good spot right now."
The final score would have been even more lopsided had Reed's fly ball left Cliff Hagan Stadium, but don't be fooled into thinking Dwyer (4-1, coasted through his outing with a big lead. He traded scoreless frames with Missouri's John Miles through the first four innings, with UK not breaking the 0-0 tie until Reed's blast in the bottom of the fifth.
"You lose Friday night and you don't score until the fifth, there it is," Henderson said. "And that's what it is and, yeah, he did (pitch in some high-stress situations). Got out of a couple of jams where they could have scored first, but didn't and really proud of him. Solid effort. He's growing up."
Dwyer sustained the momentum built in his last start, when he overcame early struggles to pick up the win as the Cats topped rival Louisville on April 1.
"The U of L start, I learned what I did wrong and I knew I had to come in here this time and fix it," Dwyer said. "I thought I came out well, kept the ball down and let my defense back me up. There was a bunch of great plays."
The best of those plays came from Austin Cousino, who fired a strike from center field on a single by Dylan Kelly to throw out Logan Pearson and preserve the shutout and UK's 3-0 lead. The play, which ended the sixth inning, drew the most emotional reaction of the game from Dwyer.
"That's the biggest play of the night right there," Dwyer said. "After we put up a three-spot and then he guns them out, we put up a zero right there and all the momentum goes to us and that just kills their momentum."
Any remaining momentum in the Missouri dugout was eliminated by a nine-run bottom of the sixth when Max Kuhn delivered one of his four hits and the Cats capitalized on three Tiger errors.
The crowd enjoyed the offensive explosion, but Dwyer's night will likely prove much more significant. The left-handed sophomore is exactly the kind of arm the 12th-ranked Cats will need to advance in the SEC and NCAA tournaments, which means his budding confidence is likely to pay dividends down the road.
"Having these starts like this is definitely good for experience and getting me ready for the postseason because that time is going to be time to have four starters ready," Dwyer said.
UK is within striking distance of first place in the SEC in spite of operating at less than full strength at the mound. In addition to Shepherd's injury, key reliever Kyle Cody is battling forearm tightness and has not yet pitched this weekend.
If the Cats can get Shepherd and Cody back and healthy and Dwyer pitching like he did on Saturday, they could be playing into June.
"Those are the things that are going to allow us to keep winning and do well once we get to the postseason," Henderson said.