Dominican Police identified the shooter as Eddy Feliz Garcia, 25, who witnesses claim climbed off a motorcycle and shot Ortiz from a short distance.
Ortiz spokesman Leo López told The Associated Press on Tuesday that Ortiz is expected to stay in intensive care for at least 48 hours.
"Lastly, I want to thank everyone for the outpouring of support and love that we have received during this incredible hard time", her statement reads.
Here are the details of the second suspect being arrested.
Countless people around - and even outside of - baseball have chimed in with well wishes for Red Sox legend David Ortiz, who is in Boston recovering from a gunshot wound suffered Sunday in the Dominican Republic.
Doctors performed surgery and Ortiz was transported to Boston in an air ambulance Monday night.
Former Red Sox slugger David Ortiz is recovering in Boston from a two-hour exploratory surgery after being shot at a bar in his native Dominican Republic. He was named World Series MVP in 2013, when he helped the Red Sox defeat the St. Louis Cardinals. Dominican doctors removed Ortiz's gallbladder and part of his intestine.
On Monday, Ortiz's representative Leo Lopez denied that the shooting had anything to do with a woman but said it was the act of "hired" killers.
Ortiz was at the Dial Bar and Lounge in Santo Domingo when a gunman approached from behind and shot him at close range in the torso, authorities said. He tried to escape but fell off, after which he was beaten viscously by the crowd in the club where the shooting took place, after which he was taken into custody.
ESPN joins the chorus of other well-wishers hoping David Ortiz makes a speedy recovery. "And I know he's in great hands".
Ortiz, a designated hitter and first baseman, ended his 20-year Major League Baseball career in 2016, when he earned the last of his 10 All-Star appearances. He maintains a home in Weston, on the outskirts of Boston.