It seems as if the walls are closing in on San Francisco Giants first baseman Rafael Devers. As his struggles in April continued, he seemed visibly frustrated. His animated aggravation has led many to suggest that he's feeling the pressure after being ranked MLB's least productive hitter last month. For a guy who is supposed to be the big bat in the lineup, he's been a virtual non-entity. After one month, the former Red Sox player is hitting .207, with two home runs, 11 RBI, and a pedestrian .537 on-base percentage in 2026. He's never hit in the City by the Bay the way he did in Boston, after being acquired in a huge mid-season trade a year ago. His best season in Beantown, 2019, produced career marks with a .311 average, 201 hits, 54 doubles, and 115 RBIs. To be fair, that is nine seasons removed, but the pace that Devers is currently on makes it feel more like light-years.…