This isn’t good news for the Cowboys.
Their Wide Receiving core is already banged up and Witten is their only reliable pass catcher. If this bleeds into the season it will be a serious problem for a team that always seems to have a lot of problems.
Dan Patrick strongly hinted in one of the early segments of The Dan Patrick Show that Witten may have suffered a spleen injury, and that it could be serious.
A source with knowledge of the situation tells PFT that Witten indeed suffered a spleen injury, which resulted in internal bleeding. Per the source, Witten will miss the rest of the preseason.