Indianapolis Colts quarterback Anthony Richardson is questionable to start Sunday’s key game against the New York Giants because of back and foot injuries.

Richardson did not practice this week, but head coach Shane Steichen fell short of declaring his starter out.

“We’ll see how next 48 hours go,” he told reporters Friday.

If Richardson, 22, is unable to go, veteran Joe Flacco would make his fifth start of the season.

The Colts (7-8) still have a shot at a playoff berth, but they’ll need to beat the Giants (2-13) and the Jacksonville Jaguars (3-12) in Week 18 — and get some help.

Indianapolis remains in the playoff hunt despite an unspectacular season from Richardson, taken by the Colts with the No. 4 overall pick of the 2023 NFL Draft.

Richardson has completed just 47.7 percent of his pass attempts (126 of 264) for 1,814 yards and has thrown more interceptions (12) than touchdown passes (8). Still, he is 6-5 in 11 starts.

Flacco, who turns 40 next month, was 1-3 in four starts earlier this year amid both injury and ineffectiveness for Richardson. Flacco has completed 66.5 percent of his passes for 1,167 yards with nine touchdowns and five interceptions.

Two of the losses were to playoff-bound teams — the Minnesota Vikings and Buffalo Bills.