|Representing the Bahamas|
|2000 Sydney||4×400 m relay|
|2001 Edmonton||4×400 m relay|
|2002 Manchester||4×400 m relay|
His personal best time is 45.81 seconds, achieved in June 2001 in Nassau. Set the day after his 35th birthday, at the time, it stood as the Masters M35 World record for over three years. Later that year, he anchored the World Champion relay team in National Record time, sprinting past Jamaica with a speedy final 100m. While Bahamas lost to the United States in both the 2000 Olympics and 2001 World Championships, the USA was disqualified years later due to the PED doping violation by Antonio Pettigrew. After numerous appeals, the Bahamian team medals were upgraded. During the 2013 medal ceremony, Munnings was credited by teammate Carl Oliver with starting the Olympic renaissance that developed into Bahamian medal success through the decade.
|1995||World Championships||Gothenburg, Sweden||12th (heats)||4×400m relay|
|1996||Summer Olympics||Atlanta, United States||7th||4×400m relay|
|1999||World Championships||Seville, Spain||7th||4×400m relay|
|2000||Summer Olympics||Sydney, Australia||3rd||4×400m relay|
|2001||World Championships||Edmonton, Canada||1st||4×400m relay|
|2002||Commonwealth Games||Manchester, England||DQ (heats)||400 metres|
|3rd||4×400 m relay|
|2003||World Indoor Championships||Birmingham, United Kingdom||DQ (heats)||4×400 m relay|
|Pan American Games||Santo Domingo, Dominican Republic||5th||4×400 m relay|
|2004||World Indoor Championships||Budapest, Hungary||5th||4×400m relay|
|2006||World Indoor Championships||Moscow, Russia||DNF (heats)||4×400m relay|
|2006 Commonwealth Games||Melbourne, Australia||3rd (heats)||4×400 m relay|
- The Bahamas 4×400 team won originally the silver medal, but the USA 4×400 team, which originally finished first in 4×400 m relay, was disqualified in 2008 due to Antonio Pettigrew confession of using human growth hormone and EPO between 1997 and 2003.
- Tim Munnings. Sports Reference. Retrieved on 2013-11-30.
- Tim Munnings. IAAF. Retrieved on 2013-11-30.