Instead it is Hart's work ethic that caused Top Rank's Bob Arum - one of boxing's true power players - to sign him before he turned pro in 2012. Arum recently told Hart he will contend for a world title by October and be on a Wheaties box before he hangs up his gloves.
"Bob said I'm not just going to be a boxing star," said Hart. "He said I'm going to be a superstar."
Hart's father, Eugene Hart, was one of boxing's stiffest punchers in an era when Philadelphia boxing reigned supreme. He turned pro in 1969 and knocked out his first 19 opponents, earing the nickname "Cyclone."
Just as his father's moniker was an apt description of his powerful left hook, Hart needed one as fitting for his own career.
It was before a workout - a few months before Hart's 2012 pro debut - that he found it.
"We were talking in the gym, and somebody said: 'It's hard work, Jesse Hart,' " said his father, who helps train Hart along with Fred Jenkins and Danny Davis. "And we just took it from there. Because he does work hard."
His co-manager Doc Nowicki wears Hart's "Hard Work" nickname on the back of a black T-shirt and Hart (11-0, 10 knockouts) will have it stitched into his trunks before Saturday's bout with Derrick Findley (20-11-1, 13 KO's).
The fight will be televised online at TopRank.tv and is on the undercard of North Philadelphia heavyweight Bryant Jennings' HBO-televised bout.
Hart's father said he often has to pull his son away from the gym or tell him he's rattled the speed bag enough for the day.
He watched from ringside at Joe Hand's Gym as his son zipped around the ring like a point guard. His long legs - thin but strong - cut with precision as he threw quick jabs.
The fighter later sat in a chair on the gym floor and strapped a piece of leather to his head. Using his neck muscles, Hart lifted the weight attached to the leather strap. The crowd chanted "hard work" as he finished.
Every other day, Hart runs eight or 10 miles at 8 a.m. He goes to the boxing gym in the afternoon and ends his night lifting weights at L.A. Fitness.
Before his first professional fight, Hart bet his father that he would eclipse his knockout streak and dispatch the first 22 fighters he faced.
But in his fifth fight, Hart injured his hand by knocking down his opponent in the first round. He was unable to push for the knockout and settled for a unanimous decision.
"I put my foot in my mouth on that one," said Hart.
And he has since knocked out his last six foes. His last three fights have lasted an average of 1 minute, 29.6 seconds. And Hart sees Saturday's fight ending in the third round.
"Don't blink," said Hart. "Get there early, get your popcorn, and get in your seat. Because it's going to be an early night."
After badgering his trainer's punching mitts, Hart walloped the heavy bag. His sweat dripped so profusely that Davis trailed his feet with a mop.
"That's why they can't beat me," Hart said as the black bag rocked to and from. "I work hard."
The chants of "hard work" began again, and Hart replied "work hard."
Saturday is Fight Night
The Theater at Madison Square Garden
Jesse Hart vs. Derrick Findley
Super middleweights, six rounds, 7:50 p.m.*
No TV (free webcast: www.toprank.tv)
11-0 Record 20-11-1**
10 Knockouts 13
5-0, 5 KO's Last Five 0-3-1**
Philadelphia Hometown Gary, Ind.
Hard Work Nickname Superman
24 Age 29
6-foot-3 Height 5-foot-6
771/2 inches Reach 74 inches
Bryant Jennings vs. Artur Szpilka
Heavyweights, 10 rounds, 9:50 p.m.* TV: HBO
17-0 Record 16-0
9 Knockouts 12
5-0, 4 KOs Last Five 5-0, 3 KO's
Philadelphia Hometown Wieliczka, Poland
By-By Nickname The Pin
29 Age 24
6-foot-2 Height 6-foot-4
D.C. Armory, Washington
Gabriel Rosado vs. Jermell Charlo
Junior middleweights, 10 rounds, 9 p.m.*
28 Age 23
21-7** Record 22-0
13 Knockouts 11
2-2, 2 KOs** Last Five 5-0, 3 KO's
Philadelphia Hometown Richmond, Texas
King Nickname Iron Man
5-foot-11 Height 5-foot-11
74 inches Reach 73 inches
*Estimated **Includes a No Contest