Tom Brady has thrown 50+ passes in a playoff game 10 times. He's 6-4 in those games. With New England, he's 6-2 in such games.
Here are the other QBs who have thrown 50+ passes in an NFL playoff game:
Dan Marino is 0-2.
Ben Roethlisberger is 0-2.
Drew Brees is 0-2.
Jim Kelly is 0-3.
Steve Young is 0-1.
Bernie Kosar is 1-0.
Lamar Jackson is 0-1.
Eli Manning is 1-0.
Derek Carr is 0-1.
Andrew Luck is 0-1.
Geoff George is 0-2.
Neil O'Donnell is 0-1.
Randall Cunningham is 0-1.
Troy Aikman is 0-1.
Danny White is 0-1.
Vinny Testaverde is 0-1.
Deshaun Watson is 0-1.
Warren Moon is 0-2.
Philip Rivers is 0-1.
Andy Dalton is 0-1.
Matt Schaub is 0-1.
Donovan McNabb is 0-1.
Neil Lomax is 0-1.
Richard Todd is 0-1.
Alex Smith is 0-1.
Todd Collins is 0-1.
Drew Bledsoe is 0-1.
Dave Krieg is 0-1.
Jay Schroeder is 0-1.
So these other 29 QBs have played 36 playoff games where the QB has thrown 50+ passes. They're a combined 2-34 (.056). Meanwhile, Tom Brady is 6-4 (.600), and 6-2 (.750) with the Pats in these kinds of games.
System quarterback though. LOL.
For the record, here are Brady's 10 playoff games with 50+ passing attempts, in chronological order:
With New England
1-19-02 vs Oak (Div round): 32-52 (61.5%), 312 yds, 0 td, 0 int, Pats win 16-13 in OT
1-14-07 at SD (Div round): 27-51 (52.9%), 280 yds, 2 td, 3 int, Pats win 24-21
1-20-13 vs Bal (AFCCG): 29-54 (53.7%), 320 yds, 1 td, 2 int, Pats lose 28-13
1-10-15 vs Bal (Div round): 33-50 (66.0%), 367 yds, 3 td, 1 int, Pats win 35-31
2-1-15 vs Sea (Super Bowl): 37-50 (74.0%), 328 yds, 4 td, 2 int, Pats win 28-24
1-24-16 at Den (AFCCG): 27-56 (48.2%), 310 yds, 1 td, 2 int, Pats lose 20-18
2-5-17 vs Atl (Super Bowl): 43-62 (69.4%), 466 yds, 2 td, 1 int, Pats win 34-28 in OT
1-13-18 vs Ten (Div round): 35-53 (66.0%), 337 yds, 3 td, 0 int, Pats win 35-14
With Tampa Bay
1-23-22 vs LAR (NFCCG): 30-54 (55.6%), 329 yds, 1 td, 1 int, Bucs lose 30-27
1-16-23 vs Dal (WC round): 35-66 (53.0%), 351 yds, 2 td, 1 int, Bucs lose 31-14
Only 6 times in NFL history has a QB thrown 50+ passes in a Super Bowl.
Brady - SB LI - 62 attempts - WIN
Kelly - SB XXVI - 58 attempts - LOSS
McNabb - SB XXXIX - 51 attempts - LOSS
Brady - SB XLIX - 50 attempts - WIN
Kelly - SB XXVIII - 50 attempts - LOSS
Marino - SB XIX - 50 attempts - LOSS
So everyone else is 0-4 in Super Bowls when throwing 50+ passes. Brady, meanwhile, is 2-0.