Reed hit a two-run homer and a grand slam in the fifth inning, the first time in the 100-plus year history of Kentucky's baseball program that a player has gone deep twice in the same inning.
"The most striking thing about it is that they were both hit to the center of the park," UK head coach Gary Henderson said. "A.J. has hit three home runs now and they have all been centerfield or middle-opposite field. That has been great to see. His swing has been good. His at bats have been good. It is nice to see him get rewarded for what he was doing."
Reed (2-0) also worked seven innings on the mound for UK, allowing just one earned run on six hits while striking out four. Zack Brown and Taylor Martin each worked an inning out of the Wildcat bullpen.
The quality start was the 10th of Reed's three-year career. He lowered his ERA to 1.50 after opening the season with a win over No. 1 ranked Virginia.
In a game that featured a rain delay of three hours and 12 minutes, UK banged out 15 hits and drew 10 walks, plus a hit batsman. Senior shortstop Matt Reida went a career-best 4-for-4 with a double and a walk. Kyle Barrett and Micheal Thomas also collected two hits for the Cats with Barrett driving in three runs.
Max Kuhn, Thomas Bernal, Connor Heady, Storm Wilson and Dorian Hairston each collected one hit for UK.
St. Joseph's (0-1) starter Jordan Carter (0-1) worked 4.1 innings, allowing eight hits and seven runs – six earned – walking three and striking out three.
UK returns to action Saturday against tournament host Old Dominion at 4 p.m. ET. The game will be broadcast live on the UK IMG Radio Network with Dick Gabriel calling the action. Fans in Lexington can hear the game live on WWTF 1580-AM and online at UKathletics.com.