Here's a breakdown:
Jarryd Hayne:
* Known for: His explosive acceleration and powerful running style.
* 40-yard dash: Unverified, but rumored to be in the low 4.4-second range.
* Strengths: Quick bursts of speed, strength, and agility.
Michael Jennings:
* Known for: His elusive running and ability to change direction quickly.
* 40-yard dash: No official record available.
* Strengths: Agility, quick feet, and a knack for finding open space.
Conclusion:
While there's no definitive answer, both Hayne and Jennings were incredibly fast and skillful players. Hayne's strength and explosiveness might give him a slight edge in a straight sprint, while Jennings' agility and elusiveness might make him faster in a game scenario with defenders.
Ultimately, their speed was just one aspect of their overall talent and impact on the field. Both players were remarkable athletes who left their mark on rugby league.