Thoracic Outlet Syndrome Fells Archer
If the 2020 season does happen — and right now, that’s an open question — it will be without Chris Archer. The Pirates announced on Wednesday that the 31-year-old righty underwent surgery to correct for thoracic outlet syndrome, ruling him out for whatever transpires this season, and perhaps ending his time in Pittsburgh given his contract situation. Given the track record of pitchers who have undergone the procedure, we can only hope that this doesn’t mark the end of the two-time All-Star’s run as an effective pitcher.
As I’ve written before, thoracic outlet syndrome is caused by a compression of the nerves and/or blood vessels somewhere between the neck and the armpit. Symptoms commonly include numbness or tingling in the fingers and hands, or fatigue or weakness that doesn’t go away with physical therapy and rest. Pitchers tend to be particularly vulnerable to TOS because of their repetitive overhand movements and the way their arm muscles build up. The condition is generally remedied by the removal of a cervical rib and two small scalene muscles.
Archer, whom the Pirates acquired from the Rays on July 31, 2018 in exchange for outfielder Austin Meadows and pitchers Tyler Glasnow and Shane Baz (the latter as a player to be named later) — a steal of a deal for Tampa Bay, the way things have gone — endured the worst season of his eight-year career in 2019. Though he struck out a respectable 27.2% of hitters faced, his walk and home run rates jumped significantly from their 2018 levels, the former from 7.7% to 10.5%, the latter from 1.15 per nine to 1.88. Both of those were career highs, as were his 5.19 ERA and 5.02 FIP, which were respectively 20% and 13% worse than league average. Per Pitch Info, his average four-seam fastball velocity fell a full tick from 2018 (95.3 mph to 94.3 mph) and was down 1.5 mph relative to ’17 and 1.9 mph relative to ’15. Read the rest of this entry »