Questions about a few Barrera wins

[Chrismart]

I was looking back at Barrera's record, and as i didnt really get into boxing up untill a few years back, i was wondering how significant these fights were at the time they took place. Was he expected to win, where they considered big slaps ect.
Cheers

Kennedy Mckinney 1996
Johhny Tapia 2002
Kevin Kelley 2003
Paulie Ayala 2004
Rocky Juarez x2 2006