SAN DIEGO -- Padres infielder Everth Cabrera is 17-for-17 in stolen-base attempt, the longest streak to start a season in team history.

Cabrera is tied with Cameron Maybin for the team lead as the Padres have tallied the second-most steals in the Major Leagues with 80. All told in 2012, Cabrera is 32-for-32, as he was perfect with Triple-A Tucson prior to his May 17 callup to the big leagues.

Cabrera's season will likely be remembered most for that ninth-inning, game-tying steal of home against the Dodgers on Saturday.

Padres' first-base coach Dave Roberts, a man who knows a thing or two about memorable stolen bases, said that play -- particularly Cabrera's willingness to make it -- sums up everything that makes the 25-year-old such an accomplished thief.

"He's fearless," Roberts said. "When baserunners are aggressive and fearless, they let their abilities and instincts take over. When people are tentative, they don't get as good of jumps because they're afraid to make a mistake."

But while Cabrera's jump to the plate may have seemed a courageous snap decision, it was not merely the product of a willingness to take chances. Cabrera had been on third for 21 pitches prior to his dash, moments spent studying Dodgers closer Kenley Jansen, seeking an opening, and calculating when to take his shot. For Roberts, that studious approach to the basepaths is another crucial component of his pupil's success.

"We do a lot of studying, and he's a student of the game," Roberts said. "With the steal of home, he was really in tune with the field awareness, what was going on. I think a lot of times that leads to his success rate."

Because of his acumen, Roberts says Cabrera has the green light to go when he sees his chance about "95 percent" of the time. The lone exceptions are rare moments when the Padres' coaching staff decides to give a certain batter a pitch or two to hit, or when defensive alignment dictates he hold.

Certainly, Cabrera's natural speed and trustworthy instincts have earned him that freedom on the basepaths. But he says work behind the scenes has also been important to his recent run.

"I'm happy about it because I've been working for this moment last year and in Spring Training," Cabrera said. "Studying and thinking about the pitcher and what they do when they go to home plate, when they pick their foot up, when they go to first. I think that's partly why [I've been so successful]."

Padres promote Portillo, 20, to Texas League

SAN DIEGO -- Adys Portillo, who was ranked as the Padres' 16th-best prospect by MLB.com before the season and has pitched his way to even higher regard within the organization, made his last start for Class A Fort Wayne on Thursday.

His next stop: Double-A San Antonio.

Portillo, a 20-year-old right-hander, was told after Thursday's start in Cedar Rapids that he'll make the jump over the California League and report to San Antonio and the Texas League.

Portillo allowed one run in six innings on Thursday. He allowed four hits and struck out three for a final line that saw him go 6-6 with a 1.87 ERA and 54 hits allowed and 81 strikeouts in 91 2/3 innings

"We think that he is ready for the challenge," said Randy Smith, the Padres' vice president of player development. "I wouldn't be surprised if he struggles some, but for us it's a better pitching environment and a little truer indicator."

Portillo will become the seventh-youngest player in the Texas League at 20 years, 211 days.

According to Baseball America, the youngest player in the Texas League is Rangers shortstop prospect Jurickson Profar (19 years, 41 days).

Portillo was part of the Padres' 2008 international draft class that cost the team nearly $5 million to sign five players. Portillo's signing bonus ($2 million) was the highest.

He struggled at Fort Wayne a year ago (7.11 ERA in 23 games) but sizzled with the TinCaps most of this season.

"His fastball command has been better and just consistency of his secondary stuff," Smith said. "It was just the consistency from outing to outing. He's done what you're supposed to do."

Padres shut down Roach after 11-2 season

SAN DIEGO -- Donn Roach, one of two players the Padres obtained from the Angels in May, won't pitch again this season, as he's reached the innings limit the organization set for him.

Randy Smith, the Padres' vice president of player development and international scouting, said Thursday the 22-year-old righty will be shut down as a precaution after 105 1/3 innings this season between the two organizations.

"He's had about a 50 percent increase in innings," Smith said. "This will make it easier for him to make that [innings] jump next year."

Last season while in the Angels' farm system, Roach threw 70 1/3 innings with Class A Cedar Rapids of the Midwest League.

Roach, who is rated as the Padres' 19th-best prospect by MLB.com, finishes the year 11-2 with a 1.88 ERA in 18 games (16 starts). A ground-ball pitcher, he allowed only 86 hits.

Roach was 5-1 with a 1.74 ERA after the trade while with Class A Lake Elsinore. He then went 1-1 with a 1.59 ERA at Double-A San Antonio.

Short hops

• Outfielder Jeremy Hermida was reinstated from the disabled list on Thursday and optioned to Triple-A Tucson. Hermida has been on the DL since April 27 with a strained hip muscle. He's already appeared in 14 games for Tucson and is hitting .222.

The Padres designated right-handed pitcher Mark Hamburger for assignment as well. Hamburger had a 7.50 ERA in five games for Tucson.

• San Diego pitcher Edinson Volquez lowered his ERA before throwing a pitch on Thursday against the Astros. Thanks to a scoring change from his last start, Saturday in Los Angeles, an error was charged to left fielder Carlos Quentin on a ball hit by Andre Ethier. Ethier was originally given a hit, but Major League Baseball overturned the call and gave Quentin an error. Volquez's ERA subsequently dropped from 3.69 to 3.61.

• Pitcher Tim Stauffer, on the DL since April 4 with a strained right elbow, will likely throw two bullpen sessions during the Padres' upcoming trip to San Francisco. He'll likely throw Monday and Wednesday before heading to Arizona to get some innings with the organization's short-season team.