Seattle Mariners backstop Cal Raleigh made history on Sunday , setting the single-season home run record for primary catchers by hitting his 48th and 49th long balls of the year. It didn't take long for Raleigh to gain another entry in the record book on Monday, as he delivered his 50th home run of the year in the first inning against the San Diego Padres ( GameTracker ). In the process, he became the first catcher to ever clear that threshold at the big-league level.

Here's a look at the home run, which came off Padres left-hander JP Sears :

Additionally, here's a look at 50-homer seasons by position, per CBS Sports' research team:

1B : 15

CF : 12

RF : 10

LF : 8

SS : 2

DH : 2

C : 1 (Raleigh)

3B : 1

2B : 0

Raleigh, 28, entered Monday hitting .247/.353/.593 (1

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