5/3/20, 3:38 AM
In 2014, Herbert broke his leg, and in 2017, he broke his collarbone. Neither of these is expected to affect long-term performance or career length according to multiple studies in the medical literature. In 2018, he sustained a concussion but did not miss any games, implying a mild severity injury. Altogether, concern level here is low.
Image Source: SD Dirk, CC-BY-2.0