Is it a coincidence? I don’t think so.
Kansas City Royals catcher Salvador Perez tore up the American League in the first half of the season for a .283/.318/.500 slash line with 17 doubles, 14 home runs, and 41 RBIs. In the second half, he’s crashed to a .212/.245/.401 with 8 doubles, 6 home runs, and 17 RBIs. Those numbers include his current tear.
In fact, Perez has struggled in the second half in the last three seasons:
Salvador Perez Splits 2013-16
1st Half 2nd Half
2016 .