The Rams got some unfortunate news on rookie Keagen Trost, who will likely miss time with a hamstring injury suffered in the preseason opener.

Rams head coach Sean McVay said defensive end Myles Garrett and wide receiver Puka Nacua are "taking it a day at a time" while offensive lineman Keagen Trost and wide receiver Mario Williams both are likely out a few weeks with a hamstring injury.

The severity of the left hamstring strain Martin sustained during Sunday's 7-5 loss to the Phillies isn't yet known, but the 27-year-old will be out of commission for at least the next week and a half.

Unfortunately, hamstring strains are both common and painful. They strike athletes of all sorts – including runners, skaters, and football, soccer, and basketball players. But what is a hamstring? It isn't actually a single ”string.” It's a group of ...