Now, a pair of injuries may have him playing a key role in them gaining a share of the Atlantic Division lead.
Bradley looks to build on the best performance of his career and help the Celtics capitalize on a meeting with the NBA-worst Charlotte Bobcats on Monday night.
Bradley, the 19th overall pick in the 2010 draft, is averaging 4.8 points this season after posting 1.7 in 31 games off the bench as a rookie.
Bradley delivered in a big way Sunday, scoring a career-high 23 points while hitting 9 of 14 from the field to power an 88-76 win over Washington. His scoring output was one less than his total from the previous six games.
Playing 39:57 surely helped, but Bradley attributed the effort to confidence.
"It's all about confidence," Bradley said. "Sometimes I would go into the game thinking twice about shooting. Now, if I'm open, I'm open and I'll shoot it. I've been making them. I was fortunate enough for my teammates to find me in transition and give me the ball and I made shots."
With Allen and Pietrus likely out again, Bradley will be relied upon to help the Celtics pull even atop the division. They're one-half game behind Philadelphia and visit lowly Charlotte (7-39), which averages a league-worst 87.4 points per game.
Boston has won seven of the last nine meetings with the Bobcats, including a 94-84 home victory on Feb. 7 behind 22 points and seven rebounds from Kevin Garnett.
Garnett, however, wasn't as effective in the last visit to Charlotte, making 4 of 11 from the floor for nine points while grabbing 14 rebounds in a 94-89 loss on Feb. 7, 2011.
The forward-center had a similar effort Sunday, getting 10 points while making 3 of 10 field goals.
Paul Pierce is averaging 22.0 points and 8.7 boards over the last three games. He had that many points while adding six rebounds in the latest road meeting with the Bobcats after totaling 16 in the previous two.
Charlotte, 4-17 at home, is allowing an average of 106.3 points during a losing streak that reached three games with a 102-89 loss at New Jersey on Saturday. Acting coach Stephen Silas felt the Bobcats didn't get their up-tempo offense going until outscoring the Nets 31-21 in the fourth quarter.
"We have to play faster," he said. "We can't be a slow-down team."
Silas could also use some improvement from Kemba Walker, who missed 9 of 13 from the floor and all four from beyond the arc while finishing with 10 points Saturday. The rookie guard has struggled greatly over the last four home games, averaging 7.8 points while shooting 30.6 percent from the field.
Walker had 16 points and seven rebounds against the Celtics last month.