SANTA CLARA — The 49ers made moves Saturday that didn’t provide a lot of clarity as to whether Brock Purdy will be suited up for their home opener against the Arizona Cardinals.

Two players were standard weekly practice squad elevations — quarterback Adrian Martinez and wide receiver Malik Turner. The 49ers also placed offensive lineman Spencer Burford on injured reserve, meaning he would miss at least the next four games with a knee injury.

Coach Kyle Shanahan said Friday that if 49ers wanted Purdy to be suited up as the emergency No. 3 quarterback, then Martinez, by league rules would have to be promoted to the 53-man roster as the backup rather than be called up from the practice squad.

Purdy could still in theory be in uniform, but not have the “emergency third quarterback” designat

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