The 21-year-old attacking midfielder joined the National League North side this summer, following a spell with Witton Albion.
He made one substitute appearance for the Sandgrounders on the opening day of the season, and has recently returned from injury.
Sam is available to make his second Brig debut at Irongate next weekend against Morpeth Town, having had a brief spell at the club in 2022.
Everyone at Brig would like to wish Sam the best of luck during his loan spell at the club.