LAS VEGAS — Floyd Mayweather Jr. stopped by to see an old foe, and Manny Pacquiao tried his best to give him a show.

With Mayweather watching intently from a ringside seat, Pacquiao dropped Jessie Vargas in the second round and bloodied his face Saturday night on his way to a lopsided decision that gave him a piece of the welterweight title once again.

Pacquiao won on all three ringside scorecards — 118-109, 118-109 114-113 — to take the piece of the title Vargas won in his last fight. The AP scored it 119-109 for Pacquiao.