Brown, who missed the entire 2012 season with a torn ACL, had accounted for 13 touchdowns in those four wins -- seven passing and six rushing.
Since then, things have gone downhill as Maryland (5-4, 1-4) has dropped three in a row and four of five heading into Saturday's game against Virginia Tech (7-3, 4-2). The Terps have been stuck on five victories for a month and still need a sixth to become bowl-eligible.
Brown has struggled as well. He has been knocked out of two games and didn't play at all in two others because of injuries. He hasn't thrown a touchdown pass or run for a score since that fourth game.
"It's definitely on me," Brown said. "That reflects that (quarterback) position. I've got to be able to lead the team down the field and make plays."
Brown was especially critical of his play in last week's 20-3 home loss to Syracuse. He threw a pair of interceptions and fumbled away a snap.
"I felt like I let the team down," he said. "The three turnovers I had, they were dumb. There's no excuse for them. I don't know what I was looking at out there. That could have been the difference in the outcome of the game. I took it personally and I took it hard. I'm going make sure it doesn't happen again."
In his defense, Brown hasn't been getting much help. Stefon Diggs and Deon Long, Maryland's top two receivers, are lost for the season with broken legs. The running game managed just 81 yards against Syracuse.
"When guys go down, you try to step up and maybe sometimes I try to do more than I should or need to," Brown said.
Still, Brown has the support of his coach.
"To me," Randy Edsall said, "C.J. gives us the best opportunity to win."
The Associated Press contributed to this report.