Through a handful of starts this season, it's been easy to pinpoint what's gone wrong for D-backs right-hander Trevor Cahill.
Inefficiency has been a key issue, with Cahill walking 12 batters in his first five starts. He's combined to give up seven free passes in his last two starts, throwing 105 pitches in each of those outings.
"He's throwing too many pitches. We'd like to see him try to get quicker outs, but it's easier said than done," D-backs manager Kirk Gibson said. "He's been incredible with runners in scoring position, though, 2-for-26. He's done that really well. We'll just try to get him to throw more consistent next time because people don't hit him hard. He's got electric stuff."
Cahill will look to stop this trend from continuing Tuesday as the D-backs square off against the Giants at Chase Field.
Picking up his first win of the season Thursday against the Rockies, Cahill allowed only an unearned run on four hits. However, the right-hander could go only five innings after tossing over 100 pitches in the start.
"It's funny because in the bullpen he's nasty. I would love for him, and I know it's hard, but I would love for him to act like he's throwing in the bullpen when he's out there," D-backs catcher Wil Nieves said. "The ball moves so much when he's in there, but when he gets in the game sometimes he tries to do too much and it backfires. That's when he gets in trouble. When he stays nice and calm, he's nasty."
Meanwhile, left-hander Madison Bumgarner will be on the hill for the Giants, ready to continue his winning ways.
Tossing quality starts in four of his five outings so far this season, he's overpowered hitters, striking out 34 batters and compiling a 3-0 record with a minuscule 1.87 ERA.
After taking a no-decision against the D-backs on Wednesday, Bumgarner is hoping the second time's the charm. He allowed just one run on five hits in 7 1/3 innings in a 3-2 loss.
"I felt good," Bumgarner said after the game. "Command felt good and arm felt good. Body felt pretty good today. Everything was there."
He's been solid on the road throughout his career, posting a 3.22 ERA away from AT&T Park.
Giants: Affeldt to pitch against hitters before return
Left-hander Jeremy Affeldt will face hitters Wednesday, a final step before he's able to come off the disabled list.
Manager Bruce Bochy said Monday that Affeldt, who has been sidelined since April 15 with a strained right side, will either throw a simulated game against Giants teammates at Chase Field, face Minor Leaguers in extended spring training or make an injury rehabilitation appearance for Class A San Jose.
Affeldt was satisfied with his throwing session off a bullpen mound Monday, showing improved command and success in throwing the entire repertoire of his pitches.
"We've been pretty aggressive with it," Affeldt said. "I've been in the training room forever every day."
D-backs: Hudson, Eaton make progress
Right-hander Daniel Hudson (Tommy John surgery) threw two innings of live batting practice and outfielder Adam Eaton (elbow) threw at a distance of 90 feet Monday, with the D-backs remaining optimistic that each player can return in a timely fashion.
Hudson, who hasn't pitched in the Majors since June 26 of last year, is expected to be back shortly before the All-Star break in July.
Meanwhile, Eaton, who suffered an elbow sprain in Spring Training, will go out on a Minor League rehab assignment beginning sometime at the start of May with the hopes of rejoining the team at the end of the month.
"It could be that early if there is a need, but our preference would be to let him continue to play," said Gibson.
• The Giants placed left-hander Jose Mijares on the bereavement list Monday, allowing the reliever to return to Venezuela to mourn his grandmother's death.
• D-backs infielder Paul Goldschmidt is hitting .357 (20-for-56) with three home runs and 14 RBIs in his last 16 games against San Francisco.
Quinn Roberts is a reporter for MLB.com This story was not subject to the approval of Major League Baseball or its clubs.