From Chronicle Staff Writer Susan Slusser at Marlins Park Nate Freiman is here and in today’s lineup, while outfielder Josh Reddick isn’t listed on the lineup card. Reddick came out of last night’s game after injuring his right knee again and he is having an MRI today, so it’s safe to assume he is going on the DL.

He already missed three weeks on the DL with the same injury and it sounds as if it’s worse; should there be any structural damage, this might be a surgical issue.

UPDATE: Reddick is going on the DL, and he has not yet gotten back results of his MRI, but manager Bob Melvin sounded encouraged because Reddick felt much better this morning than expected. He will do no baseball activity for five days and then be reassessed, perhaps begin to do rehab work. Melvin said yesterday’s re-tweek of the knee “scared (Reddick) pretty good.” Reddick told us last night that the injury felt worse than the first time he did it, but if not, that’s good news for him and the A’s.

Melvin said that, like last year, Freiman will be the A’s first baseman against left-handed starters.

Freiman landed at 6:30 a.m., got his bags and went to Starbucks, then came to the ballpark. He said his swing might surprise people, it’s significantly different: He no longer is spread out at the plate, he’s standing taller (!) and he’s got his hands low to start, rather than bringing them down during his swing. The man who made the suggestion: Hall of Famer Rickey Henderson, about six weeks ago. Henderson famously had one of the lowest crouches at the plate ever.

It seems to be working: Freiman hit .204 in April, and he’s hit over .300 since.

Freiman was scratched from last night’s River Cats game, so it was clear he’d been targeted, but I’m a little surprised the A’s went with Freiman rather than changing up and adding a pitcher or two for a day after 14 innings last night. They have plenty of first basemen/outfielders, but Jeff Francis – who earned his first-ever save last night – might be the only reliever really available today.

Here’s the lineup: Gentry CF, Callaspo 2B, Cespedes LF, Donaldson 3B, Freiman 1B, Moss RF, Punto SS, Vogt C, Milone P.

Stephen Vogt is sporting a big bruise on his left knee after getting hit by a pitch last night, but with Derek Norris (back) still out (and maybe out through the Detroit series) and John Jaso catching 14 innings, Vogt will tough it out behind the plate today.

Jaso, by the way, says he treated himself to some lobster last night. Well deserved, 14 innings for a catcher is brutal and all the A’s players are amazed by how muggy it is on the field here even with the roof closed. Sonny Gray said the heat took a lot out of him last night. It’s not like Arizona, where air conditioning cools the building down when the roof is closed – it’s still rough on the field here during games.

And everyone got a workout last night. Even Tommy Milone got into last night’s game, as a pinch hitter. He flied out to center, a well-struck ball. The A’s could really use him going seven or eight today.

Eric O’Flaherty worked a scoreless inning for Sacramento last night, and as I wrote yesterday, the A’s definitely could see him on the next homestand.

Before last night, I’d have guessed Francis might be the odd man out in the bullpen (if the A’s don’t move Jim Johnson) when O’Flaherty returns but now…. Well, that was a game-saver of an effort by Francis last night, and Johnson turned in very good work in throwing 2 1/3 innings, not the norm for him and much needed work in an extra-innings game. Looking at it, it would pretty much have to be one of those two coming off the roster, because every else is really untouchable, but both men showed their worth last night.