In the top of the ninth, with Brevard County trailing by one run, the 22-year-old slugger connected on a two-out solo home run, his fifth of the season, to tie the game. He would have plated another go-ahead run with a single in the top of the 11th, but 2015 first-rounder (No. 5 overall pick) Corey Ray was thrown out at the plate.
For the season, Coulter is hitting .238/.303/.347 through 64 games in his second tour of the Florida State League.
The rest of the best performances from top prospects Sunday
• No. 13 overall prospect Rafael Devers recorded his second four-hit game of 2016, going 4-for-5 with a triple and a double as Class A Advanced Salem fell to Lynchburg. The Red Sox's No. 2 prospect has hit .487 since the beginning of July to raise his season batting average to .264 from .233.
• No. 96 overall prospect Matt Chapman blasted a three-run home run, his Texas League-best 22nd of the season, in Double-A Midland's rout of Arkansas. The A's No. 3 prospect has homered in back-to-back games and four of his last 10 for the RockHounds.
• Tigers No. 4 prospect Mike Gerber extended his hitting streak to six games when he took No. 70 overall prospect Jack Flaherty (Cardinals' No. 2) deep in the first inning of Class A Advanced Lakeland's win over Palm Beach. The 24-year-old outfielder has hit 12 homers in 82 games this season, while his next one will match the career-best total he posted over 135 games in 2015.
• Indians No. 10 prospect Juan Hillman extended his scoreless innings streak to 21 2/3 for Class A Short Season Mahoning Valley in a win over Staten Island. The 2015 second-rounder scattered four hits, walked one and struck out four over 5 2/3 frames, throwing 50 of his 78 pitches for strikes.
• Reds No. 12 prospect Rookie Davis hurled seven scoreless innings for Double-A Pensacola in a walk-off win against Biloxi. The 23-year-old righty allowed six hits, struck out five and generated 10 ground-ball outs in the performance. For the season, Davis owns a 2.84 ERA through 73 innings (14 starts).
• Cubs No. 15 prospect Eddy Martinez recorded multiple hits for a fifth straight game, going 2-for-4 with two doubles and two RBIs in South Bend's win against Bowling Green. After a slow start to his first U.S. campaign, the 21-year-old outfielder is hitting an even .500 (19-for-38) with seven extra-base hits and 10 RBIs during his current 10-game hitting streak.
• Dodgers No. 16 prospect Omar Estevez homered for the third time in six games and tallied a career-high four RBIs as Great Lakes defeated Daytona, 10-1. The 18-year-old second baseman is hitting .351 with eight runs scored and 10 RBIs over his last 10 games.
• Mets No. 17 prospect Thomas Szapucki fired five strong innings to pick up his first pro win in Rookie-level Kingsport's victory over Danville. The left-hander allowed one unearned run on four hits and three walks while striking out eight, giving him a 0.42 ERA and 38 strikeouts in 21 2/3 innings (four starts) to begin the season.
• Tigers No. 19 prospect Sandy Baez established a new career high with eight innings pitched as Class A West Michigan edged Fort Wayne, 2-1. The 22-year-old right-hander allowed one run on five hits and matched his season high with six strikeouts.
• In his third game since being promoted to Triple-A El Paso from Class A Advanced Lake Elsinore, Padres No. 27 prospect Luis Urias connected on a solo home run and reached base five times, finishing 2-for-2 with three walks and four runs scored in a win over Salt Lake. Over 79 games in the California League, the 19-year-old second baseman batted .324/.389/.428 with 21 extra-base hits and 49 runs scored.