Stevenage have transfer-listed striker Marcus Haber and defender David Gray for the second time in eight months.
Canada international Haber and former Manchester United and Preston right-back Gray were initially
They join midfielders and on the list.
Haber, 25, started Saturday's 1-0 loss at Oldham, which left Boro bottom of League One, while Gray, also 25, has played 12 games this season.
Both men featured 46 times last season, but Haber has had a loan spell at Notts County this term, scoring twice in 11 appearances.