Pedro Alvarez AP

Pirates looking into “mental component” of Pedro Alvarez’s throwing problems

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Pirates third baseman Pedro Alvarez’s throwing issues have gotten so bad–including an MLB-leading 21 of his 23 errors on throws–that Jenn Menendez of the Pittsburgh Post Gazette reports the team is starting to look into “the mental component to find the root of the problem.”

Alvarez has always been a poor defender at third base and eventually moving across the diamond to first base has long been discussed as a possibility. Prior to this season he committed 85 errors in 3,965 innings at third base, or one every 47 innings. This season he’s made an error every 34 innings. Ultimate Zone Rating pegs him as a career-worst 9.4 runs below average this year.

An easy solution would be moving Alvarez to first base, but a) the Pirates may not want to do that in the middle of a season, b) Ike Davis has been reasonably productive there since they acquired him from the Mets, and c) Alvarez’s current .707 OPS would look even worse at first base than it does at first base. They have to fix him defensively and, if they can’t, they have to decide if his 30-homer power is worth putting up with the low batting average, low on-base percentage, and tons of strikeouts from first base.

Giants acquire Eduardo Nunez from the Twins

ARLINGTON, TX - JULY 07: Eduardo Nunez #9 of the Minnesota Twins throws for an out at first in the fourth inning during a game against the Texas Rangers at Globe Life Park in Arlington on July 7, 2016 in Arlington, Texas.  (Photo by Sarah Crabill/Getty Images)
Sarah Crabill/Getty Images
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The Giants have acquired All-Star infielder Eduardo Nunez from the Twins in exchange for minor league pitcher Adalberto Mejia, the club announced on Thursday night.

Nunez, 29, went 0-for-4 in Thursday night’s game against the Orioles. He’s hitting .296/.325/.439 with 12 home runs, 47 RBI, 49 runs scored, and a league-best 26 stolen bases in 391 plate appearances this season. Nunez has played mostly at shortstop this season, but has also logged significant time at third base and a handful of games at second base, so he’ll give the Giants some versatility.

Nunez will likely play a lot of third base for the Giants as Matt Duffy is still sidelined with a strained left Achilles. He’s earning $1.475 million this season and will enter his third and final year of arbitration eligibility heading into 2017.

Mejia, 23, was considered the Giants’ seventh-best prospect by MLB Pipeline. He earned a promotion to Triple-A Sacramento last month after posting a 1.94 ERA with Double-A Richmond. In seven starts with Sacramento, he has a 4.20 ERA with a 43/11 K/BB ratio in 40 2/3 innings.

With a roster spot open, the Twins called up infield prospect Jorge Polanco from Triple-A Rochester, per MLB.com’s Rhett Bollinger.

Report: Mariners’ Taijuan Walker drawing “strong” trade interest

SEATTLE, WA - JUNE 08:  Starting pitcher Taijuan Walker #44 of the Seattle Mariners looks on from the dugout after completing eight innings against the Cleveland Indians at Safeco Field on June 8, 2016 in Seattle, Washington.  (Photo by Otto Greule Jr/Getty Images)
Otto Greule Jr/Getty Images
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Bob Nightengale of USA TODAY reports that the Mariners have received “strong” trade interest for starter Taijuan Walker. The right-hander is currently on the mend from tendinitis in his right foot.  He’ll throw a bullpen on Friday at Wrigley Field with scouts in attendance.

Walker, 23, has a 3.66 ERA with an 80/18 K/BB ratio in 86 innings this season. It’s his first bit of sustained success at the major league level. What’s arguably just as intriguing is the fact that Walker will be under team control through 2020.

The Mariners have been hovering around .500 for the last month and entered Thursday six games behind the first-place Rangers in the AL West and 4.5 games out of the second AL Wild Card slot, behind three other teams as well as the two Wild Card leaders. It’s enough uncertainty which could push the Mariners to sell.