On Opening Day, Citi Field introduced a variation of the "999 Challenge," a viral trend encouraging baseball fans to consume nine hot dogs and nine beers during a nine-inning game. A journalist undertook this challenge for a reporting assignment, detailing an experience marked by unexpected portion sizes and mixed reactions from attendees.

The "999 Challenge" tray at Citi Field was priced at $60 and included nine 3.5-inch hot dogs and a single 24-ounce can of beer, with options of Coors or Heineken. This single can was intended to be divided into nine 2.5-ounce servings, poured into plastic souvenir cups adorned with the Mets logo, to be sipped across each inning. Prior to the event, the journalist had consulted competitive eater Geoffrey Esper, who advised skipping breakfast and varying hot dog toppings to combat "flavor fatigue."

However, the journalist's expectations for a daunting culinary feat were altered upon seeing the offerings. The hot dogs, described by some fans as "slider-sized" or "sad," were significantly smaller than anticipated. The beer servings were similarly noted for their modest volume, roughly the size of a double shot glass per inning.

During the three-hour game, where the Mets defeated the Pirates 11-7, the journalist reported that the first two mini hot dogs were easy to consume. However, issues such as stale and cracked buns, combined with the dryness of the hot dogs, necessitated the use of condiments. The journalist also noted an imbalance in the hot dog-to-beer ratio, leading to increased thirst. The single 24-ounce beer, meant to last nine innings, reportedly warmed to a lukewarm temperature before it could be fully consumed.

By the fourth inning, after eating approximately three bites per hot dog, the journalist felt uncomfortably full. The large tray setup also reportedly hindered the ability to stand and cheer. Ultimately, the journalist consumed all 24 ounces of beer and approximately 6.5 of the nine hot dogs before ceasing the challenge due to bloating and discomfort. Other fans present at the stadium also expressed disappointment regarding the portion sizes of both the hot dogs and beer.