Sewald (neck) played catch Friday and is scheduled to throw a bullpen session within the next few days, Nick Piecoro of The Arizona Republic reports.
Sewald has been on the shelf since Sunday due to an issue on the left side of his neck, and Friday marks the first time he's done any sort of throwing since then. It remains unclear if he'll be able to return to the Snakes' bullpen before the end of the regular season, but the team may know more once the 34-year-old is able to begin mound work.