The righty made a neat first impression with the team as the Phillies beat the Yankees 3-2 in their official Grapefruit League opener.
The new ace pitched two hitless innings against the Yanks in his spring training debut Thursday. Halladay struck out Jorge Posada, Nick Swisher and Randy Winn.
The only runner to reach base against Halladay came on a Placido Polanco error.
The Phillies got Halladay from Toronto as part of a four-team trade in December. His arrival in Philly was marked by mostly joy but some fans still feel burned after the Phils traded former ace Cliff Lee to replenish the farm system.
The Phillies pitchers looked sharp for eight innings as Kyle Kendrick, Jose Contreras and Andrew Carpenter each pitched two scoreless frames.
The Phillies held a 1-0 lead entering the ninth until Sergio Escalona allowed two New York runs to put the Bombers up 2-1. But, the Phightins fought back behind RBI hits by Paul Hoover and Wilson Valdez.