This article is part of our Fantasy Baseball Injury Report series.
The Astros have battled injuries to key players throughout the season, with one particular injury occurring with regular frequency. Since the start of the regular season, Alex Bregman, Altuve, Springer and Diaz have suffered hamstring strains of varying degrees. Each injury has forced the injured athlete to the bench, with Altuve, Springer and Diaz all requiring time on the injured list.
A strain is an injury that occurs to a muscle or its tendon after the structure is forced past a specific characteristic known as its yield point. At this point, the tissue fails to certain degrees dependent on the resulting damage. Medical testing, often an MRI, is utilized to reveal the severity of the strain and allow medical professionals to assign each injury a grade. A Grade 1 injury is the least severe strain and is often referred to as mild. Grade 1 strains are marked by microtearing of the tissue. As a result, the muscle's overall structure remains intact, though the injured individual often reports pain with movement.
A Grade 2 strain is considered moderate and involves damage to actual muscle fibers. As a result, strains that receive this level of grade are often referred to as partial tears. The affected athlete usually experiences pain and a loss of function in the muscle. Hamstring strains that are given a Grade 2 rating are often slow to heal, as the body must build new muscle tissue to fill in the