The Brakes are in the midst of a relegation battle in the National League North and have ended both of their previous two games with ten men.
Joe Clarke was sent off just before half-time in the late 3-2 defeat to Darlington whilst Jack Edwards also saw red at the end of the first half in the 1-1 draw at North Ferriby United.
Holleran’s side are just two points above the bottom three and now face a tough run of five games against play-off hopefuls.
The boss told the Leamington Courier: “Joe Clarke was unfortunate, I don’t think it was the right decision and Jack Edwards, most referees wouldn’t have made that decision.
“But we can’t be playing with ten men. We’ve picked up two red cards not for a lot but this league is hard enough without playing with ten men.
“The last two games we could have had six points or four so to end up with just one is really disappointing.”
On Saturday’s game against high-flying Harrogate, Holleran added: “If we’re going to stop in this league we’re going to have to win the games on paper we can win and pull a few results out of the bag.”
For more news, reaction and action from across the National League, like us on Facebook and follow us on Twitter and Instagram.