He jumped between an officer and a suicide bomber(equivalent of jumping on a grenade in my book) and the best we could give him was the silver star? Typically when someone jumps on a grenade they are awarded the Medal of Honor, at least many of them were.
Hopefully the case is under review. Often times a lesser medal is presented immediately since the review process for a Distinguished Service Cross can take over a year and the Medal of Honor reviews often take two to three years.