Staks has played 19 ATP/slam tourneys and two Challengers. He has a good chance to surpass Vilas' total of 31 ATP/slams in '77 but Vilas won 16 tourneys and was 130-15 in his matches, something no one even dreams of achieving any more. He also played a few other non-sanctioned events for a total record of 145-15 that year.
Wow thanks for that!
Found a way I could find it by looking at end of year rankings. In brackets was the end of year ranking.
From the top 100 here's most tournaments in one year
2014: Igor Sjisling (84th)- 37 tournaments, Joao Sousa (54th)- 34 tournaments, Adrian Mannarino (44th)- 32 tournaments
2013: Lukas Rosol (47th)- 33 tournaments, Benoit Paire (26th) , Pablo Andujar (48th), Benjamin Becker (79th), Kenny De Schepper (84th)- 32 tournaments
2012: Denis Istomin (43rd), Filippo Volandri (88th)- 33 tournaments, Carlos Berlocq (66th), Olivier Rochus (90th)- 32 tournaments
2011: Benoit Paire (95th)- 35 tournaments, Pere Riba (89th), Tobias Kamke (96th)- 33 tournaments, Fabio Fognini (48th), Carlos Berlocq (60th)- 32 tournaments
2010: Dustin Brown (92nd)- 35 tournaments, Potito Starace (47th), Arnaud Clement (78th)- 34 tournaments, Fabio Fognini (55th) 33 tournaments.
2009: Oscar Hernandez (70th), Christophe Rochus (86th)- 36 tournaments, Marcel Granollers (91st)- 34 tournaments,
2008: Oscar Hernandez (68th)- 34 tournaments
2007: Nikolay Davydenko (4th), Fabio Fognini (95th)- 26 tournaments
2006: Kristian Pless (84th)- 36 tournaments
2005: Tomas Zib (59th)- 35 tournaments
2004: Alex Calatrava (81st), Oscar Hernandez (85th)- 35 tournaments
Interesting stuff (yeah i'm bored at work and have time to kill).