The pectoralis major muscle is a large muscle in the upper chest, fanning across the chest from the shoulder to the breastbone. The two pectoralis major muscles, commonly referred to as the ‘pecs,’ ...

BALTIMORE – A torn pectoralis major muscle, or pec muscle, is a serious injury striking boxers, pro wrestlers, body builders and even a growing number of military servicemen. It's a condition that ...

Milwaukee Brewers pitcher Corbin Burnes left his start Monday against the Seattle Mariners in the sixth inning with a left pec strain, according to manager Craig Counsell. Here’s what you need to know ...