Lastly, on Saturday the Yankees lost again as Masahiro Tanaka returned to his struggling ways but the bigger news came from Triple-A, as Yankees top prospect Gleyber Torres left the game early after a slide into home plate.
Khris Davis hit a go-ahead two-run homer in the third that held up to back rookie Jharel Cotton's first victory since May 4, and the Oakland Athletics completed a four-game sweep of the slumping Yankees with a 4-3 win Sunday.
Davis hit his team-best 18th homer in the third after Chad Pinder tied the game on a two-run double that inning. That is a long way from the 5-0 ledger and 1.67 ERA the starters were when the Yankees won six straight from June 7-12.
"Even in the midst of (this) streak, we've battled back and given ourselves a chance to win every game, " Headley said.
Chapman came off the disabled list after missing more than a month and pitched a 1-2-3 eighth.
Joyce reached base five times, Jesse Hahn (3-4) pitched five innings to defeat NY for the first time in his career and Jed Lowrie had an RBI single to keep the A's rolling at home.
Didi Gregorius homered leading off the fourth for the Yankees, who lost three of the games here by one run.
Davis described the sweep as a "confidence-boost for sure, just because they're a great team on the other side". They have overplayed expectations however they can't get too comfortable they have to keep grinding.
Austin Romine and Brett Gardner drove in runs for NY, which has lost a season-high five straight.
A bullpen alternately described last week by Joe Girardi as exhausted, taxed and fried, was called upon one last time this trip when a starter failed to go deep.
"Mistakes", Yankees manager Joe Girardi said.
"I think we just had a good approach". "I look at how you've played over the course of a season and we've really played well, and it's a very talented group". It marked his second-longest start of the season.
"Towards the end I wanted to win for the team so badly I just wanted to pitch as long as I can go", Cotton said. He said A's regular catcher Stephen Vogt, who served as the designated hitter on Sunday, advised him to attack the Yankees' hitters and not to nibble because they'll just "foul you off".
Error doesn't prove costly: The A's played excellent defense up until the ninth when Chad Pinder committed a two-base throwing error.
That's a quick summary of the pitching issues facing the Yankees, who are on a season-high six-game losing streak as they return home for a three-game series against the Angels that begins Tuesday.
"I think it's been really impressive, obviously, what he did today, but what he's done as a whole this season", Oakland reliever Sean Doolittle said after Healy hit his eighth home run in 14 games.
Luis Cessa allowed four runs on five hits over four innings in Sunday's loss to the A's.
Holliday opened the scoring with a shot to center to lead off the second. Offensively, Starlin Castro leads the Yankees with 88 hits and 43 RBI while Aaron Judge and Brett Gardner have combined for 142 hits and 83 RBI.
NOTES: Before rejoining his teammates in Oakland, Chapman had a rehab outing with Double-A Trenton on Friday. Chapman has seven saves in eight tries this season. He jammed his left arm and was diagnosed with a hyperextended elbow and will undergo further testing on Monday. The A's fell to 4-12 on replay challenges this season after Jaycob Brugman's out call at second base was confirmed in the fourth inning on an attempted stealing. First-pitch temperature at the Coliseum was 90 degrees - the hottest to start a game since it was 91 degrees on June 20, 2008.