Callaway has added four yougsters to its stable of players, including Belgian star Thomas Detry.
Lee McCoy, Matt NeSmith and Will Starke join Detry in becoming full Staff Professionals.
Detry, who will initially play in Europe, joins compatriots Thomas Pieters and Nicolas Colsaers on Callaway's books.
He enjoyed a successful NCAA career at the University of Illinois, winning the 2016 Big Ten Championship, and competed for Team Europe in the 2014 Palmer Cup.
Commenting on the signing of Detry, Peter Harrison, Director of Tour Relations at Callaway Golf Europe, said: “Thomas was one of the world’s best young amateurs and he has a bright future both in the game and with Callaway.
"If his first tournament as a Staff Professional is anything to go by – he finished T6 in last week’s KPMG Trophy on the European Challenge Tour in his native Belgium – we have a player that is definitely one to watch.”
Lee McCoy: A 1st Team All-American in 2016 for the University of Georgia, 3rd ranked amateur in the world and finished Fourth as an amateur at the 2016 Valspar Championship on the PGA Tour.
Matt NeSmith: A 1st Team All-American in 2016 for the University of South Carolina, 1st Team All-SEC (2016) and 8th ranked amateur in the world.
Will Starke: An All-American selection for the University of South Carolina and won the Mackenzie Tour Q-School in April.
Neil Howie, President and Managing Director of Callaway EMEA, added: “Callaway has a strong heritage of helping to nurture exceptional young golf talent and we are confident our latest signings will enjoy the full support of our Tour teams around the world, and recognise very quickly that ‘Winners Play Callaway’."
All four will play Callaway equipment and use Odyssey putters.
Head to the Callaway website to learn more.