Jim Curtin hailed Cavan Sullivan after he became the youngest player in MLS history this week, with more minutes potentially on the horizon when the Philadelphia Union face Nashville SC.

Sullivan replaced Tai Baribo, who scored a hat-trick, for the final five minutes as the Union ended a near-four-month wait for a home win by thrashing the New England Revolution 5-1.

At just 14 years of age, Sullivan has surpassed Freddy Adu as the youngest ever MLS player, also becoming the youngest debutant among the top North American professional sports leagues and the big five European leagues, UEFA Champions League and Europa League, dating back to 1988.

"It was a special, special night," Union head coach Curtin said afterwards. "The place had a buzz. This is just the first chapter in Cavan's career. 

"For those that don't know, we do have a plan for him. It's not just minute by minute or day by day; there is a plan in place. 

"You guys don't get to see him every day in training, but the staff does, and the time was right to give him an opportunity.

"The reality is, guys, he's not a normal kid. We've known that from the start. Because he's different, he has a different plan and a different trajectory to other players in our group."

Sullivan's second senior outing could come against a Nashville team sitting 10th in the Eastern Conference, two points above Philadelphia, but looking over their shoulders after five straight defeats.

The latest of those losses – a comprehensive 3-0 reverse against Orlando City – led forward Jacob Shaffelburg to demand better.

"We haven't been playing well for the fans" Shaffelburg said. 

"They should know that we're trying our hardest, we're working hard, but they do deserve better. We got to give them better."

PLAYERS TO WATCH

Philadelphia Union – Tai Baribo

On Wednesday, Baribo became the first Israeli player in MLS history to score a hat-trick. 

Israel is the 50th different nation to produce a player that scored at least three goals in an MLS match.

Nashville SC – Hany Mukhtar 

Nashville attempted eight shots in their defeat to Orlando on Wednesday, the 12th time this season they have been held to fewer than 10 shots in an MLS match. 

Mukhtar (41) has created more than twice as many chances as his next closest team-mate this year, with Sam Surridge teeing up 17 attempts. His creativity could be key.

MATCH PREDICTION: PHILADELPHIA UNION WIN

Nashville have lost five straight matches for the first time in club history with three of those defeats coming on the road. 

They have managed only two wins in their last 12 away from home across all competitions (three draws, seven defeats), so approach this one as clear outsiders.

The Union, meanwhile, are unbeaten in their last six meetings with Nashville, winning three and drawing three, including a 2-1 road victory in early April.

OPTA WIN PROBABILITY 

Philadelphia Union – 45.1%

Nashville SC – 28%

Draw – 26.9%