The 27-year-old Spaniard fired a three-under par 68 to face on 15-under 198 after 54 holes at Vidanta Vallarta resort.
“I performed actually good golf,” Rahm mentioned. “Tee to inexperienced was actually good.”
Rahm seeks his seventh profession US PGA title and his first since successful his maiden main final 12 months on the US Open at Torrey Pines.
“It has been slightly little bit of some time,” Rahm mentioned. “Up to now I’m happy with the best way I’ve performed and I can simply hold having fun with every second and hopefully play as strong as I’ve tee to inexperienced, hold hitting fairways, hold hitting greens and simply roll a couple of and hopefully prolong that lead.”
Clinging to a one-stroke lead, Rahm discovered a greenside bunker on the par-5 18th, then blasted his third shot to the again of the inexperienced and rolled within the clutch birdie putt for his third birdie on the outlet in as many days.
“That one on 18 was the primary one outdoors 10 toes I noticed roll in,” Rahm mentioned. “If I can simply hold that going and make putts like I did the primary two days, I believe tomorrow I’ll give myself a very good likelihood.”
That putt restored Rahm to the two-stroke edge he loved when the spherical started with Individuals Kurt Kitayama and Cameron Champ sharing second on 200 after late stumbles.
“My sport has felt good. I’m in nice spirits, so tomorrow I’m simply going to maintain doing what I’ve been doing,” Champ mentioned. “I’ve hit a couple of shaky pictures, however I’ve simply been capable of get round and rating.”
Individuals Patrick Rodgers, Nate Lashley and Davis Riley shared fourth on 201 with countryman Alex Smalley seventh on 202 on the long-established occasion, which makes its US PGA debut this 12 months.
Rahm reached the inexperienced in two on the par-5 sixth and two-putted for birdie then drove the inexperienced on the 298-yard seventh and tapped in for birdie after lacking a 14-foot eagle putt.
The Spaniard discovered water off the tenth tee and made bogey however answered with a birdie on the par-5 14th, dropping his method inches from the cup, then closed with a ultimate birdie.
“The one hiccup was the tee shot on 10,” Rahm mentioned. “And it wasn’t even that unhealthy.”
‘Embrace the nerves’
Kitayama, looking for his first PGA title, missed the inexperienced on the par-3 seventeenth and made bogey to fall off Rahm’s tempo.
“I really feel fairly good about right now’s spherical,” Kitayama mentioned. “I hit it pretty lengthy out right here in order that helps. I’m good on the greens. I really feel like I’m seeing the road and rolling it effectively.”
Champ had back-to-back bogeys at 15 and 16 after being warned for sluggish play to drop behind Rahm.
“Simply obtained to embrace the nerves and pleasure,” Champ mentioned. “Simply attempt to management them one of the best you possibly can and understanding that every one the opposite guys might be simply as nervous as you irrespective of what number of wins they’ve.”