Royals swoop for Arsenal keeper Stack
The 23-year-old, who was farmed out by the Gunners to Millwall last season, will provide competition for current number one Marcus Hahnemann and is expected to seal a permanent deal with the Royals in January.
Manager Steve Coppell has been searching for a new keeper after deciding to send Jamie Young on loan to Rushden and Diamonds to gain first-team experience.