Former NFL running back Justin Forsett played 122 games in the league, which included a handful of games at the Oakland Coliseum. So he knows what it's like play there during baseball season, when the A's share the field.
And he wasn't a fan.
The Cal product tweeted out quite the comparison to what it's like to fall on the infield dirt at the Coliseum, comparing it to belly-flopping on the pavement.
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Raiders quarterback Derek Carr agreed:
David Nixon, who spent a season with the Raiders, also chimed in about his experience playing in Oakland during baseball season.
That certainly would explain why it would feel like rocks.
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Oakland Athletics
Perhaps Matt Chapman and the rest of the A's are used to it ... but for now, we all can't stop picturing people belly-flopping on the concrete.