The Arizona Diamondbacks arrived at Chase Field in Phoenix on Monday afternoon for a light workout and heavy anxiety.

After a full afternoon of scoreboard watching, their fears were confirmed. There will be no postseason for the defending NL champions.

The Atlanta Braves and New York Mets split their doubleheader on Monday, meaning both those teams will head to the playoffs while the Diamondbacks were the odd team out. All three finished the regular season with an 89-73 record, but the Mets and Braves both owned tiebreakers over Arizona because they won the season series.

In the end, there was nothing to do but watch the season slip away on TV. Diamondbacks ace Zac Gallen was playing catch on the field as the final out was recorded before trudging off the field and to the clubhouse.

“I was planning on playing tomorrow,” Gallen said. “The disappointing part is that we — to a certain extent — controlled our own destiny and we didn’t come through. Didn’t execute.”

The D-backs needed either the Mets or Braves to sweep the two games on Monday to make the postseason, but there was little incentive for the Mets to win the second game because they had already clinched their spot in the playoffs by winning the first game.

It’s a bitter finish for the Diamondbacks, who were hoping to produce a suitable encore to their surprise run to the World Series last season.

They were active adding players during the offseason, grabbing hitters like Eugenio Suárez, Joc Pederson and Randal Grichuk. They also tried to beef up the pitching staff by adding signing Jordan Montgomery and Eduardo Rodriguez.

Some of those moves worked out, and some of them didn’t. They fell one win short of October, even if they won five more games than last year, when they snuck in after an 84-win season.

There are plenty of reasons for the disappointment, including a 2-5 record over the season’s final week. The stumbling began on Sept. 22 when they built an 8-0 lead at Milwaukee by the third inning, only to lose 10-9.

They never seemed to completely recover.

“We controlled our own destiny for a little while there and let it slip out of our fingers,” pitcher Merrill Kelly said. “There are a lot of games that I think we let go.”