In the 12th round, No. 350 overall, Minnesota selected right-hander Ethan Mildren.
The junior out of Pittsburgh is the first Panther drafted by the Twins. In 2013 he pitched 114 2/3 innings for a 2.35 ERA. With a 10-3 record, the 6-foot-4, 230-pound righty went seven-plus innings in 13 of his 15 starts and struck out 76.
"He won't light up the gun -- he's 90-91 [mph] -- but he throws straight and we think he's a starter," scouting director Deron Johnson said.
He also earned first-team All Big East honors in 2013.
Twins take PR prep shortstop Molina in 11th round
With their 11th-round pick, No. 320 overall, the Twins selected high school shortstop Nelson Molina.
Molina, 18, is ranked as the No. 5 prospect from Puerto Rico by Baseball America.
The 6-foot-3, 175-pounder from Arecibo, P.R., bats left-handed. He has above-average speed and is steady defensively, possessing a good arm.
"He's got a nice body," scouting director Deron Johnson said. "We think he's a true shortstop and we think he's got a nice left-handed swing."
In Round 13, Minnesota lands righty Peterson
With their 13th-round pick, the Twins drafted right-hander Brandon Peterson out of Wichita State, No. 380 overall.
A Savage, Minn., native, Peterson served as a closer for the Shockers in 2013 and pitched 40 innings with 26 appearances. He accumulated a 1.12 ERA with 42 strikeouts and a 3-1 record.
At 6-foot-1, 198 pounds, Peterson has a fastball that touches 95 mph and consistently falls at 90, which he pairs with a slider.
"He's got some pretty good tools," scouting director Deron Johnson said. "He's running up to 95 and he's got a good slider. He's not as big as [Twins' 12th-round pick Ethan] Mildren, but he's a bulldog on the mound."
Twins get college speedster Granite in 14th
In the 14th round of the First-Year Player Draft, the Twins selected outfielder Zack Granite at No. 410 overall.
A junior out of Seton Hall, Granite led his team with 35 stolen bases in 2013 -- second in the Big East and eighth nationally. Over the season, the 5-foot-9, 185-pound center fielder posted a .990 fielding percentage and a .304 average at the plate. He had 21 multihit games and 30 RBIs.
"He can really run," scouting director Deron Johnson said. "He's a plus runner, not a lot of power, but he's got good bat control. He plays a small man's game. He's a good bunter and he can spray the ball around; he's a gap-type hitter."
Granite earned First-team All Big East honors in 2013 and is the second Pirate to be drafted by the Twins this year -- righty Brian Gilbert was taken in the seventh round.
In Round 15, Twins nab college lefty Penilla
With the 440th pick overall in round 15, Minnesota drafted left-hander Derrick Penilla out of Mount San Antonio College.
Penilla led the Mounties with 90 1/3 innings in 2013 as he went 6-3 on the season. He posted a 2.39 ERA with 96 strikeouts and 32 walks in 16 appearances -- 14 of which he started.
"He's got a good changeup and his fastball is anywhere from 87 to 91 [mph]," scouting director Deron Johnson said. "He's not a hard thrower, but he throws strikes and he's got a pretty breaking ball."
The 6-foot-2, 180-pound left-hander was the second lefty the Twins have picked up.
Kelly Erickson is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.