Wing Dillyn Leyds has torn his anterior cruciate ligament and is out for the rest of the season, while scrumhalf Jano Vermaak had surgery to his neck and could miss the next four months.
Neither was in Argentina but the news of their misfortune reached the camp during the weekend.
It was a sour way to end a good weekend that saw the Stormers move to top of the SA Conference standings with 18 points from four wins in five outings. They have a bye this weekend before taking on Japan’s Sunwolves after that.
With star fullback Cheslin Kolbe in doubt for the Stormers’ next assignment against the Sunwolves at Newlands after being knocked out cold against the Jaguares, coach Robbie Fleck could have a fullback problem.
Leyds would have been the natural fit if Kolbe is ruled out. Scrumhalf is not such an issue, though, with both Nic Groom and Louis Schreuder performing well.
In other good news, Springbok centre Damian de Allende is a couple of weeks ahead of schedule with his return from an ankle injury and should be available for the match against the Sunwolves in 13 days.