Max Scherzer and his wife, Erica May-Scherzer, have made it no secret that they love dogs — especially dogs in need.  The couple not only adopted four dogs from animal shelters, but they’ve continued to donate both their time and money to the cause, starring in PSAs and in May-Scherzer’s case even serving the board of directors for the D.C.-based Humane Rescue Alliance.

On Thursday morning, the Scherzers made one of their most generous promises yet, according the HRA, which announced on Twitter that the couple agreed to cover all adoption fees from Thursday until Sunday in an effort to spur animal adoption so that pets displaced by Harvey might have space if they end up in D.C.

The Nationals pitcher retweeted the announcement almost immediately, asking fans to help “make room for more incoming animals” affected by the storm.

“Adoption fees range from $85 up to about $200 depending on the animal and the age of the animal,” Humane Rescue Alliance Chief Operating Officer Stephanie Shain told Fox 5. “But Erica and Max have pledged because they know how important it is we get these kennels empty and they are going to cover those adoption fees.”

The Scherzers’ pledge comes a day after local shelters made a plea to area residents to adopt pets to allow pets displaced by Harvey to find refuge in D.C.

Many pets in and around Houston, where the storm dumped more than 50 inches of rain over the weekend, were “separated from their owners or were homeless strays,” the rescue group said (via Facebook) Wednesday.

“HRA expects to receive dogs and cats from Texas this week, although an exact time of arrival is yet to be determined,” the group added.

Shain told Fox 5 on Thursday that she’s not sure how many Texas pets are being shipped to D.C., but that at least 20 were on their way.

“But we have been told that we should expect for that number to increase,” she added.

Shain said it won’t just be dogs coming in either.

“We expect a lot more cats,” Shain said.

And while the Scherzers appear to be more dog people than cat people, Shain said their money will cover all adoptions from the shelter.

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