In-season development is a real thing, and at all levels.
Oswald Peraza, month by month:
April: 16 g, .197/.290/.328, .618 OPS, 20.2 K%, 8.7 BB%
May: 22 g, .216/.258/.364, .622 OPS, 23.7 K%, 5.4 BB%
June: 20 g, .303/.379/.513, .892 OPS, 22.9 K%, 9.2 BB%
July: 15 g, .323/.400/.597, .997 OPS, 28.6 K%, 10.0 BB%