He is the godson of celebrated Argentine golfer Vicente Fernández. Ruiz turned pro in 1992. Having played regularly on the Challenge Tour in 2005, Ruiz was successful enough to graduate directly to the full European Tour for 2006.
However indifferent performances meant that he dropped down the Challenge Tour again in 2007.
After finishing 21st on the money list for the 2008 season, missing out by one place on gaining exemption on the European Tour, Ruiz earned his card for 2009 with a 22nd place finish at the qualifying school. Ruiz has played in The Open Championship twice, in 2003 and 2006.
All his career victories have been in South America, highlighted by the 2007 Argentine Open. He has also finished second in several tournaments, including the Costa Rica Open in 2002, the Guatemala Open in 2004, the Panama Open in 2004 and 2005, the Peugeot Challenge (Spain) in 2005.
1989 Paraguay Junior Championship Challenge Tour wins (1) Tour de las Américas wins (4) Other wins (4) DNP = Did not play CUT = missed the half-way cut "T" = tied Yellow background for top-10.
World Cup (representing Paraguay): 1995, 2003, 2005 Irons - Mizuno Mp-64 3-PW, Dynamic Gold X100 Fairway Woods - Taylormade Rocketballz Stage 2.0 Tour Tp 14.5 Fubuki 73x Utility - Mizuno Member of Parliament-CLK 17deg Fubuki 73X Wedges - Mizuno MPT-10 White Satin 54, 60/05.
1989 Paraguay Junior Championship 1990 Paraguay Junior Championship, Argentine Junior Championship 1991 Amateur Argentine Open, Paraguay Junior Championship, Argentine Junior Championship 2001 Abierto del Litoral (Argentina) 2007 Abierto Visa de la Republica (co-sanctioned with Challenge Tour) 2012 Televisa TLA Players Championship, Taca Airlines Open 1999 Venezuela Professional Golf Association Championship 2007 Carlos Franco Invitational (Paraguay), Prince of Wales Open (Chile) 2010 Brazil Open.