When does a sample size become large enough for a fan and a team to rationally be worried about a player’s performance? Is it 20 games? Forty? Sixty? A full 162-game season? Perhaps the answer to that question is in the eye of the beholder. Because for a vast majority of fans, the worrying begins the second the season commences. Of course, that isn’t rational, but it’s the reality of what fandom does to a person. For  Corey Seager , worrying about his performance has never been an issue. Even when he goes through slumps, it’s almost a certainty that he’ll come out of it on the other side with a renewed vigor. He’s simply one of the best hitters in the game — not even the dog days of summer can keep him down for long. But through 39 games so far in 2026, Seager has not looked like his normal self. He’s slashing a measly .193/.300/.379 with seven home runs and 19 RBIs. For the first time in probably forever, Seager’s OPS is below .700.…