"I told myself to stay within myself, put a good swing on it and don't try to do too much," he said. "Honestly, I thought I had a double, but the ball carries well out here so I guess it had enough to get out."
Gindl, who scored twice for the Rafters, faced Scorpions reliever Bryan Woodall (Diamondbacks) once before on Sept. 4. His three-run homer off Woodall keyed Double-A Huntsville's 10-7 win over Mobile.
"I can't believe it happened again, but it did," Gindl said.
The Florida native spent the 2010 season with the Stars, batting .272 with nine homers and 60 RBIs.
"I just think you see good arms day in and day out," Gindl said of Double-A pitching. "It's definitely a difference. In the lower levels, you can focus at-bat to at-bat. Once you get to that level, you have to focus pitch to pitch. When you get your pitch, you have to hit it, because when you miss those guys can make you pay."
Farris, drafted a round earlier than Gindl, is batting .500 after Monday's performance. The 24-year-old second baseman has scored seven runs and stolen three bases in four games.
"He's a great player and he's a great teammate also," Gindl said of Farris. "He always picks you up. The kid is unbelievable, he's doing really good out here right now."
Former Royals first-rounder Mike Montgomery (1-0) picked up the win, allowing a run on three hits and fanning three over 3 2/3 innings for the Rafters.
"He was nasty from what I saw," Gindl said of the left-hander. "I've never seen him and he impressed me, that's for sure."
Tigers' first-round pick Chance Ruffin, son of former Major Leaguer Bruce Ruffin, allowed a run on one hit in the ninth inning, but earned the save.
Charlie Culberson (Giants) collected three hits, including a solo homer, for the Scorpions (4-2). Orioles farmhand Ryan Adams drove in this eighth run of the fledgling season, tying him with Brandon Wood of Mesa for the league lead.
Giants prospect Ryan Verdugo (0-1) took the loss, surrendering three runs -- one earned -- on two hits over two innings. Bruce Billings (Rockies) fanned two over two perfect frames.