The Windup Newsletter ⚾ | This is The Athletic’s MLB newsletter. Sign up here to receive The Windup directly in your inbox.Cristopher Sánchez didn’t allow a run in May. How rare is that? Well, it’s only happened once for a starter since 1920, so … pretty rare. Plus: A first proposal from the MLBPA, a base-running problem in San Francisco and Ken says the Brewers might have a deadline surprise up their sleeves. I’m Levi Weaver — welcome to The Windup!Heating Up: Sánchez is cruisingIn 1911, a guy named Grover Cleveland Alexander (who, yes, was born during Grover Cleveland’s first term as the 22nd president of the United States) set a Phillies franchise record by pitching 41 consecutive scoreless innings.That record held until yesterday, when Sánchez — with seven scoreless innings in a 3-0 win over the Padres — extended his scoreless streak to 44 2/3 innings.If we’re counting pitchers from before Benjamin Harrison ever took office (as the 23rd president), Sánchez’s streak isn’t too high on the all-time list. But if we count from the live-ball era (it started in 1920, here’s why), the lefty has now cracked the top 10. With just one more scoreless inning, he’ll have the longest streak by a left-hander, surpassing Carl Hubbell’s 45 1/3 in 1933.The all-time record is 59, set by Orel Hershiser with the Dodgers in 1988. Hershiser was also the only other pitcher to go an entire calendar month without allowing a run (min. four starts), holding opponents scoreless in September 1988. He then began the postseason with eight more scoreless innings before the Mets rallied for three in the ninth inning of Game 1 of the NLCS.Hershiser’s streak probably deserves its own revisit soon, but for now, Sánchez is on a heater we haven’t seen in a long time.Middle Relief: Brewers leading small-market revolution?Today, we have an excerpt from Ken Rosenthal’s latest column, in which he notes how the Brewers (and other teams) are making it tricky for ownership to point to a lack of parity in the sport.