Single word for "led my team to victory"

I don't think there is a single word for your example. It's also pretty hard to get a phrase around five words, but I'll try:

... inspired my team's win in ABC XYZ competition...

Inspired is defined like this by dictionary.com:

1. to produce or arouse (a feeling, thought, etc.): to inspire confidence in others.
2. to influence or impel: Competition inspired her to greater efforts.

"I led my team to victory" also works perfectly fine.

Triumph

verb - achieving a victory; being responsible for it.

A proper noun before 'Triumphed' would convey that the said person/thing is responsible for the said victory, e.g. "Napoleon Triumphed at the battle of Austerlitz."

I want to convey "led my team to victory in ABC XYZ competition."

*insert person or thing led my team to victory triumphed in ABC XYZ competition.

"I triumphed in ABC XYZ competition."

I can't manage a single word, but I feel like you could encompass much of the same idea in 'spearheaded a victory in ABC XYZ competition'.

In particular, being the person leading a charge seems like too important a historical and modern concept to not have a single word covering it. A similar by more modern notion might be to 'be on point', although this is obvious far less succinct. The central idea I'm aiming for is to encompass the notion of 'my team' implicitly within the verb chosen, if anyone has any ideas based on this.

It does somewhat diminish clarity slightly, forcing an interviewer to process this a little more than perhaps they'd like, as the phrasing has been made clunkier for the sake of brevity, but I think making progress on cutting this down further will probably need to go along some such lines.

Edit: Perhaps 'captained a victory' might make this even clearer, but it still isn't shorter in terms of word count.

I captained the winners of ABC XYZ competition.

Prevail

• My team Prevailed in ABC XYZ competition

Note, the definition itself doesn't exactly meet the letter of your question yet it might meet the spirit rhetorically

 [Definition of prevail][1] at Websters
intransitive verb

 1: to gain ascendancy through strength or superiority : TRIUMPH

 2: to be or become effective or effectual

 3: to use persuasion successfully
    prevailed on him to sing

 4: to be frequent : PREDOMINATE
   the west winds that prevail in the mountains
 
 5: to be or continue in use or fashion : PERSIST
   a custom that still prevails

Prevail is dramatic and brings with it a suggestion of an arduous challenge with each definition getting some color from the other I "feel" (subjective here)

I take it that you hope to be asked about details of what you list and have a story of perseverance and more you hope to be asked about? This word might trigger that ... ... yet be ready for a pshaw or eye roll if what you led was rather routine and unremarkable!

a few more thoughts - while 'prevail' does not itself suggest leadership it brings a sort of "moral strength" flavor - not only were you good but you faced challenge and adversity with poise and steadyness - different that say "finished first" or "outshone" or "captain of winning team" (which says nothing of the nature of your contribution or suggests you even broke a sweat ?)

Also as you mention specifically that you had to encourage or prod group members some of the "persuasion" definition 3 fits nicely alongside 1 - and that your team wone had something to do with the "continuing at it" aspects of 4 and 5

Leader or not? "my" alone doesn't necessarily claim "leadership" but, it softly suggests a good bit more than merely being 'on' the team - enough so that it might be cheeky to say 'my' team if you were sitting on the bench or an also ran - I'd say it implies you were at least a leader on it?

Best!