While it is true that he is the first wrestler born in the 1990's to compete in a Royal Rumble match, he is not the youngest wrestler in Rumble history. He is actually the 8th youngest entrant. Here are the 8 youngest:
#8 - Bo Dallas (22 years, 8 months) in 2013
#7 - Cody Rhodes (22 years, 7 months) in 2008
#6 - Mabel (21 years, 11 months) in 1994
#5 - Cibernetico (21 years, 9 months) in 1997
#4 - Hornswoggle (21 years, 8 months) in 2008
#3 - Aldo Montoya (21 years, 3 months) in 1995
#2 - Kenny Dykstra (20 years, 10 months) in 2007
#1 - Rene Dupree (20 years, 1 month) in 2004
Bo Dallas, the son of Mike Rotuna, is now the youngest participant in Royal Rumble history. Dallas was born on May 22, 1990 it makes him the first ever professional wrestler born in the 90s to enter a Rumble match. His father's first Rumble appearance was in the 1992 Royal Rumble. At that time Bo was not even 2 years old yet.