Stephen Elliott (illness), Danny Collins (Achilles), Nyron Nosworthy (hamstring) and Andy Welsh (dead-leg) are all considered doubtful for The Black Cats next match against Seattle Sounders on Wednesday.
"There are one or two knocks but it's nothing serious," manager Mick McCarthy told the clubs official website.
Sunderland Vs Vancouver: Davis (Alnwick h/t), Nosworthy
(Christensen 66), N. Collins (Wright h/t), Caldwell, Arca (Smith
h/t), Lawrence (Woods 71), Whitehead, Miller (Robinson h/t), Welsh
(Piper 42), Brown (Murphy h/t), Stead.