Barnes -- a 2011 first-round Draft pick and the Red Sox's No. 13 prospect -- struck out nine batters over five innings in his pro debut Sunday as the Class A Greenville Drive stymied the Lakewood BlueClaws, 4-0, at Fluor Field.
"I just wanted to give my team a chance to win and do what I've done the last couple of years," the former University of Connecticut standout said. "Though we don't really get too many fans at UConn. I was pretty excited for this start ever since I signed."
Barnes, selected 19th overall last June, fanned at least one batter in each of his five frames. He gave up singles to Carlos Perdomo and Aaron Altherr and issued a pair of walks.
"When I was in the fourth inning, I tried to do too much," said Schumer, who followed Altherr's hit in the fourth by walking Christopher Duffy. "I need to let my stuff take care of it, don't get too over-amped."
The 21-year-old right-hander credited the strikeouts to his fastball. He said his coaches and father, who was in attendance, told him the pitch ranged between 94-97 mph. Barnes said he didn't sneak a peak at Fluor Field's malfunctioning radar gun, which reported multiple 106-mph readings in the season's first week.
Barnes, who also wields a curveball and changeup, won 11 games and compiled a 1.93 ERA in 17 outings as a junior in 2011.
His counterpart, Ethan Stewart (0-1), allowed one run -- David Renfroe's second-inning solo homer -- on four hits over 5 1/3 innings. He struck out five.
Renfroe also singled home two runs during the Drive's three-run eighth inning to complete his 2-for-4 afternoon.