Cave City was down 2-1 heading into the bottom of the third when the Cavemen got busy.
With two down and one on in the frame, Dalton Carpenter reached first on a throwing error and Dalton Bell drew a base-on-balls to juice the sacks for the Cavemen.
Jacob Odom came through with a hot shot to third that plated Tyler Booth for Cave City's first run of the third.
But the biggest shot of the inning belonged to Garrett McSpadden. He smoked a double to the fence in left-center, driving in three runs to give Cave City a 5-2 lead after three.
Cave City starter William Boyd retired Highland 1-2-3 in the top of the fourth and when Cave City came to bat in the home-half of the frame, the Cavemen were looking to pad their margin.
And Booth did just that with a two-out homer over the fence in left, pushing the Cavemen on top 6-2.
The Rebs pushed their last run of the game across in the top of the fifth.
Ben Reed started the fifth off with a hit, while Caleb Davidson followed by reaching base with a single. Next up, Matt Schneider reached base the hard way, getting hit by a pitch to load the bases with no outs for the Rebels.
Major Harris came through with a sacrifice fly that drove in Reed.
Boyd managed to keep Highland from doing any more damage in the frame by getting a groundout for the second out of the fifth. Then, McSpadden ended the frame by gunning down Schneider at first on a ball in the dirt.
Adam Gann came on in relief of Boyd in the top of the sixth and he gave up just one hit to Highland, preserving Cave City's 6-3 win.
Highland began the game with a run in the visitor's half of the first inning.
Davidson hit safely to get Highland going and Schneider drew his first hit-by-pitch of the game. Major Harris coaxed a free pass on four balls to jam the bases with Rebels.
Payton Edmondson picked up the first RBI of the game on a fielder's choice that scored pinch-runner Ben Markway, giving Highland a 1-0 lead.
Cave City locked the game at 1-all in the bottom of the first on a fielder's choice from Dalton Carpenter.
Highland took its last lead of the contest in the top of the third on a sacrifice fly from Edmondson that brought Schneider around to score.
Boyd earned the win for Cave City, giving up five hits, while walking one, fanning one and hitting four Rebel batters.
Landon Strobbe, Highland's starting pitcher, allowed five hits, gave up two walks, fanned one and hit one.
During the tournament's first day of action March 19, Cave City knocked off Southside 14-8 and fell to Hillcrest 5-3.
In the Southside game, Booth, Carpenter, Jeremy Johnson, Odom and Gann has two hits each.