Chesterfield are looking to make it three matches unbeaten after back to back draws at home, and could be doing that with long term injury absentee Paul McGinn returning to the team.
"He’s back in the squad,” said Caldwell.
"He would have been in the squad on Tuesday but we felt getting another hour of football in a match situation would have helped him so he’s back in the squad.”
The Spireites are without Ian Evatt and Liam Graham for the trip to the Memorial Stadium, as well as Ched Evans, who Caldwell confirmed is nearing a return.
He said: "Ched’s progressing well; the strength is coming back in to his ankle.
“He’s getting another course of injections on Monday and we hope he’ll be training with the group at some point next week.”
Caldwell saw plenty of positives in Tuesday’s 3-3 draw at home to Peterborough United, but was still left frustrated at the result and the goals conceded.
"I was delighted with a lot of things on Tuesday,” the manager said.
"The big frustration was the goals against, but there were a lot of good individual performances.
"The team came together in an attacking sense and found some rhythm; they got a lot of opportunities and scored three great goals.”
Jon Nolan returned to the side against the Posh and Caldwell praised his impact, and sees his comeback as a timely boost.
He said: "He brings so much to the team in terms of energy.
"He also brings a bit of composure and quality on the ball. He was a big miss but we’re delighted to have him back.
"We didn’t have enough passers who can take the ball from defence and move it forward, and that would have been one of the reasons why we were better on Tuesday in an attacking sense.
"We got the ball through the attacking thirds quicker and more quality coming into the strikers
Despite picking up a point, the gap between Chesterfield and survival increased to ten, but Caldwell still believes the Spireites can remain in League One, should they reach a specific points total and turn draws into wins.
"We have to get to a points total that will give us a chance to stay in the league. We understand that we haven’t picked up enough points in recent games to get to that total,” he explained.
"We need to start winning games, draws aren’t enough at this stage. There is a points total and if we get that I’m sure we’ll stay in the league, we can’t concern ourselves with other teams, we have to focus on our own job and win games very quickly.”
Bristol Rovers have an impressive home record and are currently ten unbeaten at the Memorial Stadium, but Caldwell and his team are prepared for the challenge as both sides will be desperate to collect three points for very different reasons.
"I went to a game earlier in the season at their ground so I know the stadium and the pressure they’ll try and put us under so we’re ready for that,” Caldwell added. “It’s up to us to take the game to them and focus on what we’re going to do.
"It’ll make for a good game, at this stage of the season with the play-offs and relegation there’s not many games where teams aren’t playing for anything, so it’s two teams who are hungry to achieve their goals come the end of the season.”