Former NFL player Merril Hoge is one of 18,400 plaintiffs suing Monsanto, saying Roundup caused cancer

Thousands of cancer patients say Roundup weedkiller gave them cancer. Monsanto, the maker of Roundup, says studies show the key ingredient -- glyphosate -- is safe.

(CNN)Former NFL running back and ESPN analyst Merril Hoge has filed a lawsuit against Monsanto, claiming its popular weedkiller Roundup caused his cancer -- resulting in permanent "physical pain and mental anguish."

The suit was filed this month in the US District Court for the District of Idaho. Hoge accuses Mon