"He's a guy that's had some success in years past, and our people like him," Melvin said, "so you could see him here at some point."
Hatcher was on the Dodgers' Opening Day roster, posting a 4.66 ERA in 26 appearances before landing on the DL June 23 with thoracic inflammation. The 32-year-old began a Minor League rehab assignment July 29, pitching to a 1.50 ERA in five games.
In three seasons with Los Angeles, Hatcher compiled a 4.64 ERA in 112 games, racking up 131 strikeouts in 116 1/3 innings. He also pitched with the Marlins from 2011-14.
A patchwork A's bullpen has mostly struggled since the departures of veterans Ryan Madson and Sean Doolittle, both sent to Washington in a trade last month, and Melvin continues to seek late-inning options within the group that's left.
"I think that's also why you're looking at a Chris Hatcher," Melvin said. "We're looking at some guys that can pitch well for us.
"There's a great opportunity for relievers right now, with the way things have gone for us."
Right-hander Chris Bassitt, who underwent Tommy John surgery last May, was thought to be a relief option for the A's at some point this season, but he's still in the process of finding consistency at the Triple-A level.
Bassitt, who will likely reassume starting duties next spring, last pitched Monday, allowing one run in two innings. He has a 7.45 ERA in 13 games for Nashville.
"You look at the underlying numbers, and there's been games where he's been pretty effective and games where he's struggled some," Melvin said. "At some point in time, he's going to settle in and pitch consistently."
A's to honor Eckersley
The A's have plans in place to name D Gate at the Coliseum after Hall of Famer Dennis Eckersley in a special ceremony Aug. 25 ahead of their game against the Rangers. Former A's teammates Rickey Henderson, Carney Lansford, Terry Steinbach and Mike Moore are expected to join Eckersley's family for the dedication.
On the following day, the A's will celebrate Dennis Eckersley Day, with 15,000 fans receiving an Eckersley bobblehead. Eckersley will be on hand to throw out the ceremonial first pitch before the 1:05 p.m. PT game.
• Right-hander Bobby Wahl, who underwent thoracic outlet surgery on his right arm Monday, is expected to be pitching again by Spring Training, per Melvin.
Jane Lee has covered the A's for MLB.com since 2010.