Hunter Ensley provided the long-awaited swing.

Top-ranked Tennessee, playing from behind in much of its midweek tilt with ETSU at Lindsey Nelson Stadium on Tuesday, took a two-run lead on Ensley's two-RBI double off the wall in left in the eighth inning.

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But the Bucs, who entered the game tied for fifth nationally in home runs, had two more left in them, drawing even on Jamie Palmese two-run shot in the ninth and then taking the lead for good on Grant Gallagher's no-doubter in 10th to beat Tennessee, 7-4 in 10 innings.

It marked the Vols' (20-1) first loss since Game 2 of the College World Series last June.

Ensley was 4-of-6 at the plate with three RBIs and two doubles. His single up the middle kept Tennessee alive in the bottom of the 10th before Andrew Cotten struck out Chris Newstrom.

ETSU (16-5) totaled 10 hits, including four home runs.

Tanner Franklin (1-1), who entered in the 10th and was the eighth of eight bullpen arms that the Vols used, took the loss.

Tennessee was nearly out of the top of the first inning before Cody Miller singled to center and reached third on a fielding error with two outs.

The sequence set up Cooper Torres' RBI single to left to score Miller and put ETSU up 1-0 early. Austin Breedlove limited the damage there with a fly out to right.

The Vols responded in the bottom half. Down to two outs, Andrew Fischer fought off pitch after pitcher before wearing one to reach first. Levi Clark drew a walk to load the bases and Reese Chapman hit a hard grounder to second that Torres overran and allowed two runs to score and give Tennessee a 2-1 advantage through one.

The Buccaneers clapped back in the second. Brayden Sharp, who took over on the mound for Breedlove, recorded two quick outs on a pop up and strikeout, but Tristan Curless smacked a no-doubter to the right to draw even at 2-2.

Tennessee went down in order in the second, then Thomas Crabtree replaced Sharp and got an out. But Blake Jacklin reached on a fielder's choice as the Vols were unable to turn two and Miller sent a Crabtree patch to the first level of the porches in left to pull ETSU ahead for a second time, 4-2.

Tony Vitello went back to the bullpen after that, calling on Austin Hunley, who inherited a two-run deficit and one out but ended the frame with a strikeout and line out to Fischer at third.

Hunter Ensley led off the third with a single through the left side but Tennessee came up empty-handed, with the park keeping near-long balls from Fischer and Clark.

Hunley, after giving the Vols a shot in the arm defensively in the top third, walked the lead-off batter and then hit the next one to put two on with no outs for ETSU in the fourth and another pitching change followed, this time it was Andrew Behnke walking into a jam.

Behnke's second pitch reached the warning track, but was run down by Dalton Bargo. The headlining play of the inning, though was a 6-4-3 double play, engineered by Ariel Antigua, who fielded a hard-hit grounder at short to turn two and Tennessee escaped still down two.

Behnke again stranded a pair of runners in the fifth and Gavin Kilen paid it off with a home run to left-center for the Vols' first run since the bottom of the first and trimming their deficit to 4-3.

Tennessee was unable to add more. Clark struck out to leave Fischer stranded at first, but Bryson Thacker--the Vols' fifth reliever in the game--got two quick outs in the sixth and Brayden Krenzel closed out the frame with a ground out at third.

Facing trouble again in the seventh, Tennessee used a 4-6-3 double play to pull off another escape act and remain within in reach heading into the bottom seventh.

Jay Abernathy, put into the lineup in the seventh, worked a walk in lead off and Enlsey made the most of it, singling to left to score him from second to tie the score at 4-4 with just one out.

The Vols loaded the bases on a Clark walk, sending Chapman to the plate with two outs three at-bats later.

The Bucs went back to their bullpen, bringing out right-hander Landon Crumbley and his first pitch was sent right to Curless at first base off of Chapman's bat to rob Tennessee of an opportunity to add more and preserving the tie.

That's what Krenzel did, too, sending ETSU down in order in the eighth to hold the score at 4-4.

Manny Marin and Abernathy each reached on fielders choices in the eighth with one out, and Curley drew a walk to loaded the bases again, putting the Vols in position to take the lead and add some cushion.

Ensley provided both. His double off the wall in left scored two and Tennessee led 6-4 going into the ninth.

As it turned out, ETSU had some life left in it. The Bucs, down to their last two outs, tied the game at 6-6 on a Jamie Palmese two-run homer off of Ryan Combs.

Clark, the go-ahead run to lead off the bottom ninth for Tennessee, reached first on a throwing error only to be followed by a pop up and strikeout. Marin kept the inning alive with a walk to put two on for Abernathy.

Abernathy nearly walked it off, but Blake Jacklin made a sliding grab in right to rob the hit and send the game into extra innings.

Tanner Franklin pitched the top 10th and got two outs on back-to-back strikeouts, both swinging. Grant Gallagher took a swing, too but made contact and homered over the porches in left to give the Bucs a 7-6 lead and put the Vols on the ropes.

Tennessee was down to its last out in two swings after Curley and Kilen both flew out to center. Ensley singled up the middle to give the Vols another chance with Fischer due up.

Andrew Cotten's pitch hit Fischer on the foot to send him to first, putting two on and moving Ensley into scoring position for Chris Newstrom, but Cotten recovered and tossed the game-sealing strikeout in seven pitches.

Tennessee will go on the road in SEC play for the first time this weekend.

The Vols play No. 12 Alabama (20-1) in a three-game series at Sewell-Thomas Stadium in Tuscaloosa beginning Thursday (7:30 p.m. ET, ESPNU) with Game 2 slated for Friday (7 p.m. ET, SEC Network+) and Game 3 on Saturday (2 p.m. ET, SEC Network+).

The Crimson Tide, who are coming off of a series sweep of previously ranked Texas A&M last weekend, were the only team to win a series against Tennessee during its league and national title run last season.

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