In 2019, the inaugural year of the National Team Development Program, a pool of more than 1,400 boys and girls participated in the Phase 1 regional trials. The following players were invited to the Boys U15 National Combine.
2019 NTDP U17 men's Combine
| Name | School | Club |
|---|---|---|
| Ian Acheson | Valor Christian (Colo.) | Colorado Outlaws |
| Evan Bailey | Simi Valley (Calif.) | LA Mavs |
| Tyler Barnett | St. Mary's Annapolis (Md.) | Annapolis Hawks |
| Cade Bauer | Glenbrook North (Ill.) | True Lacrosse Illinois |
| Aris Brown | Sierra Canyon (Calif.) | LA Heat |
| Andrew Ciprian | Lynbrook (N.Y.) | Igloo |
| Collin Costello | Hebron Academy (Mass.) | Cape Cod Lacrosse |
| Collin Custer | Bethel (Wash.) | Graham Kapowsin |
| Parker Cyr | Mill Creek (Ga.) | Thunder LB3 |
| Jacob Darrow | Severn (Md.) | Annapolis Hawks |
| Bradley David | Mount St. Joseph's (Md.) | Annapolis Hawks |
| Luke Dellicicchi | Locust Valley (N.Y.) | FLG |
| Timothy Devir | Reading Memorial (Mass.) | NE Twisters |
| Trevor Fairbanks | Sierra Canyon (Calif.) | LA Heat |
| Jack Fates | Phillips (Mass.) | Fighting Clams |
| Charles Fielder | Highland Park (Texas) | StickStar |
| Oran Gelinas | Waltham (Mass.) | Laxchusetts |
| Justin Gold | Don Bosco Prep (N.J.) | |
| Cameron Goodloe | Chantilly (Va.) | MaxLax |
| Ethan Green | Loyola Blakefield 9Md.) | FCA |
| Patrick Guinee | Manchester Essex (Mass.) | Laxchusetts |
| Colin Hagstrom | Mahtomedi (Minn.) | |
| Evan Hayek | Oakdale (Md.) | Team Maryland |
| Eli Hebert | Woodward Academy (Ga.) | Thunder LB3 |
| Benjamin Jasper | Bellarmine Prep (Wash.) | South Sound |
| Ridge Johnson | Lakeside (Ga.) | Thunder LB3 |
| Cameron Johnson | McKinney (Texas) | West Coast Starz |
| Ethan Joseph | Kings Ridge Christian (Ga.) | Georgia Tigers Elite |
| Thomas Karoly | Roswell (Ga.) | Atlanta Kings |
| Charlie Keating | New Canaan (Conn.) | Eclipse |
| Patrick Lenden | Bethlehem (N.Y.) | Power Lacrosse |
| Jack Liselli | IMG Academy (Fla.) | Colorado Fire |
| Michael Lynch | Chaminade (N.Y.) | Igloo |
| Christian Margita | McLean (Va.) | Top Caliber |
| William McCarthy | North Middlesex (Mass.) | New Hampshire Tomahawks |
| Benjamin McKelvy | DeMatha (Md.) | 300 Lacrosse |
| Liam McLane | Rye Country Day (N.Y.) | Predators Lacrosse |
| Luke Modesto | Point Loma (Calif.) | Mad Dog Lacrosse |
| Cole Monette | Woodward (Ga.) | Thunder LB3 |
| Cole Nichter | John Carroll (Md.) | Kooper's |
| Matthew Niznik | Calvert Hall (Md.) | Team 91 |
| Jack Norberto | Mahwah (N.J.) | Patriot STARS |
| Bobby O'Grady | Roxbury Latin (Mass.) | Mesa |
| Rand Paddack | Palatine (Ill.) | Team One |
| George Mason Penrod | Clear Springs (Texas) | Texas Legacy |
| Edward Perry | Bridgewater-Raynham (Mass.) | Laxchusetts |
| Will Potter | Rivers School (Mass.) | Laxchusetts |
| Remington Reynolds | Gilman School (Md.) | Iron Horse |
| Machado Rodriguez | Chaminade (N.Y.) | Team 91 |
| Peter Russchenberg | Palatine (Ill.) | Team One |
| Billy Savage | Timberlane Regional (N.H.) | HGR |
| Will Shiber | St. Paul's School (N.H.) | The Swarm Elite |
| Ben Sisk | Daniel Hand (Conn.) | Boneyard |
| Ryan Skripps | Rivers School (Mass.) | Clams |
| Cardin Stoller | Boys' Latin (Md.) | Team 91 |
| Mitchell Taylor | Mountain View (Ga.) | Empire |
| Gabe Turner | Etowah (Ga.) | 3D Georgia |
| Asher Wagnon | St. Pius X (Ga.) | Thunder LB3 |
| Ezra Zabukovic | South Bend John Adams (Ind.) | True National |