Viloria, 6-foot-0, 160-pounds, was rated sixth among International players to enter the market, according to ESPN who said, "Sort of like Johan Santana but with less power."
Viloria, 16, received a six-figure bonus believed to be around $150K.
"When I saw him he was working between 89 and 90 with the makings of a breaking ball, and good feel for a change," said Randy Smith, the Padres director of international and professional scouting.
The southpaw was being courted by several teams but was reportedly fond of how the Padres' organization is being developed.
"Being left-handed it is good and helps us continue to develop our presence in that market," Smith added of the Venezuelan product.
Jarce is a 6-foot-2, 165-pound shortstop that the Padres think will eventually land at third base.
"An average arm and some pop in his bat," Smith said of Jarce. "He uses the whole field, has a lean athletic body, and makes hard contact; pretty good looking bat."
Over the last few years, the Padres have added several players with high ceilings. Felix Carrasco, a third baseman has hit well to begin the year with the AZL Padres. Yefri Carvajal is a player many believe will be special. Jose Ceda and Pascual Juan can touch 95-plus with their fastballs.
And the team is still looking at having a new facility in the Dominican Republic in place prior to the 2007 Dominican Summer League season.
"We have made pretty good strides," Smith conveyed. "(Viloria and Jarce) are more along the lines of what we are looking for in body and tools. A better physical athlete."