1 9 8 9 |
| January 9 |
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Signed forward Todd Mitchell to a second 10-day contract. |
| January 11 |
Signed guard Kelvin Upshaw to a 10-day contract. Placed guard Dwayne Washington on the injured list with a pulled groin. |
| January 14 |
Signed forward Todd Mitchell for remainder of season. Signed guard Craig Neal to a 10-day contract. |
| January 21 |
Signed guard Kelvin Upshaw to a second 10-day contract. |
| January 24 |
Signed guard Craig Neal to a second 10-day contract. |
| February 3 |
Signed guard Craig Neal for remainder of season. |
| February 14 |
Activated guard Dwayne Washington from the injured list. |
| February 24 |
Activated forward Sylvester Gray from the injured list. Waived forward Todd Mitchell. |
| March 22 |
Signed forward Dave Popson to a 10-day contract. Placed forward/center Pat Cummings on the injured list with stress fracture in left tibia. |
| April 2 |
Signed forward Dave Popson to a second 10-day contract. |
| April 12 |
Signed forward Dave Popson for the remainder of the season. |
| April 18 |
Guard Rory Sparrow gets the first triple-double in HEAT history by scoring 24 points, dishing out 10 assists and pulling down 10 rebounds in a game against Dallas. |
| May 4 |
Miami receives its first postseason honor, when guard Kevin Edwards is named to the 1989 NBA All-Rookie Second Team. |
| June 27 |
The HEAT selects guard/forward Glen Rice from the University of Michigan with the fourth pick in the NBA Draft. The HEAT also selects guard Sherman Douglas from Syracuse in the second round (28th overall) and guard Scott Haffner from Evansville in the second round (45th overall). |
| July 1 |
Did not retain right-of-first-refusal on guards Craig Neal and Dwayne Washington and forward Dave Popson. |
| August 5 |
Signed guard Kenny Drummond. |
| September 7 |
Re-signed forward/center Pat Cummings. |
| September 28 |
Signed guard Gary Massey and forward Terry Davis. |
| October 2 |
Traded Cleveland's second-round draft choice in either 1990 or 1992 (which had been acquired during 1988 Expansion Draft on June 23, 1988) to Golden State for
forward Tellis Frank. |
| October 5 |
Signed first-round pick Glen Rice and forwards Eric Brown and Mark Plansky. |
| October 7 |
Signed second-round pick Scott Haffner and guard Gerald Greene. |
| October 9 |
Signed second-round pick Sherman Douglas. |
| October 11 |
Waived forward Eric Brown. |
| October 16 |
Waived guards Gerald Greene and Gary Massey. |
| October 25 |
Waived forward Sylvester Gray, center John Shasky and guard Kenny Drummond. |
| November 1 |
Placed forward Mark Plansky on the injured list with a pulled groin. José Pañeda is named HEAT Spanish radio voice. |
| November 11 |
Waived forward Mark Plansky. |
