FINAL MAY 13
PIT BOS
Western lowland gorilla
A Pittsburgh
FINAL JAN 30
TOL DET
Polar bear
A- Toledo
FINAL APR 15
DEN TEX
Nile hippopotamus
A Denver
FINAL JUN 25
STL DAK
Western lowland gorilla
A Animal Kingdom
IN PROG JUL 20
MAR SHD
Beluga whale
A Receiving clubs
FINAL JAN 27
TOK CHN
Giant panda
F Japan
SCHEDULED APR 23
CHN ATL
Giant panda
A Zoo Atlanta
FINAL MAR 1
OKC TPA
African lion
A- Busch Gardens
FINAL JUL 8
FTW STL
Western lowland gorilla
A- Saint Louis
FINAL NOV 6
PHX MIA
African lion
A- Phoenix
DELAYED JAN 15
STL CMH
Asian elephant
INC Both
FINAL MAY 31
PRG BER
Przewalski's horse
A Prague
Breaking The Gorilla Trade: Pittsburgh lands a 33-year-old silverback. Boston rebuilds with two prospects.
← Trade Tracker

Nile hippopotamus · No. 3 of 22

The Hippo Who Delayed His Own Trade

Mahali used 27% of Denver's water, then refused to finish crate training.

Nile hippopotamus
Photo: Paul Maritz / CC BY-SA 3.0 · Illustrative image of the species, not the individual animal.

The Deal

Mahali — M, 22 years at Denver, born on site 2002 Denver Zoo Conservation Alliance → Three-acre Texas preserve habitat
Why it happenedDenver ended its Nile hippo program. The 1959 Old Pachyderms building was flagged by AZA inspection as no longer suitable, and Mahali's habitat consumed roughly 21 million gallons of water a year, about 27% of the zoo's entire 2024 water use.

The Grades

A

Denver

Moved a player whose contract, in water alone, consumed more than a quarter of the organization's annual budget for the resource. Ruthless and correct.

A-

Texas

Acquired a proven 4,000-pound franchise attraction and three acres to put him on.

The Breakdown

Every so often a team has to move a beloved veteran purely for cap reasons, and the fanbase never forgives them. This is that trade, except the cap is water.

Mahali's habitat used approximately 21 million gallons a year. That is about 27% of the Denver Zoo's total 2024 water consumption, for one animal. Add a 1959 building that AZA inspectors flagged as no longer suitable and you have a front office with no real choice.

Then the player held out. The move was originally announced in July 2025 for that fall. It slipped. The reason given by the zoo is the single best sentence in the sport this year: Mahali made it known to his care team that he was not quite ready. He had not finished crate training. A 4,000-pound athlete simply declined to report, and the organization had no leverage whatsoever.

Denver leaned into it, publishing a holiday blog titled Home for the Ma-hali-Days while the standoff continued. He finally reported in spring 2026 and was introduced to an older female on arrival. Twenty-two years, one franchise, one holdout, and an exit that cost his old team a quarter of its water bill to keep.

Watch

The Denver Zoo crate-training Mahali for the move. He was not yet ready. Video: Denver Zoo Conservation Alliance, via YouTube.

Sources

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