40-Man Roster Deadline Reaction and Analysis: National League

Last week I covered the American League half of the flurry of transactional activity that occurred as a result of the 40-man roster and non-tender deadlines. Is any one move here as impactful as signing a Yoshinobu Yamamoto or a Matt Chapman? No, but when your favorite team experiences a rash of injuries in June, whether or not they have the depth to scrap and compete is often dictated by the people and processes that surround this day. Below are my thoughts on the National League, with some quick scouting snippets on most of the added players and thoughts about roster construction where I had something to say.
Arizona Diamondbacks
The Diamondbacks lone addition was lefty Blake Walston, a former $2.5 million high school signee who, despite being young for his class and physically projectable as an amateur, has seen his fastball velocity plateau and slightly decline since he signed. He’s had fits and starts where he’s thrown harder, but for the most part, Walston’s fastball still sits 89-92 mph and his performance peripherals took a nosedive in 2023, though part of that was likely because of the PCL hitting environment. The lanky 22-year-old is still a fair long-term prospect because of his age and what one could reasonably hope will still be late-arriving physicality, but for now, I’d consider him at the very back of Arizona’s 40-man starting pitching depth chart. Read the rest of this entry »