After missing most of his first full pro season with persistent hamstring injuries, C.J. Chatham has stayed healthy and advanced from Class A to Triple-A in the past two years. Now that he's knocking on the door of the big leagues, the Red Sox have shipped him to the Arizona Fall League to further enhance his development.

Chatham said his to-do list while with the Peoria Javelinas consists of two main items: "Defense, working at second more, get more versatility. Ball flight, I did have more extra-base hits this year, which was good, but obviously keep working on that."

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Selected 51st overall (second round) in the 2016 Draft as a shortstop, the Florida Atlantic product has spent the bulk of his pro career at that position. But Boston has All-Star Xander Bogaerts at short and signed through at least 2025, so Chatham will spend much of his AFL time at second base.

Ranked No. 9 on MLB Pipeline's Red Sox Top 30 Prospects list, Chatham is a capable shortstop with good instincts, soft hands and plus arm strength. Those attributes should help him adapt to second base, where Boston doesn't have a clear-cut starter for 2020.

To become a big league regular at second, especially in an organization that banks on contending on an annual basis, Chatham will have to show he can make an impact at the plate. He consistently produces line drives from the right side of the plate, but he does so at the expense of generating much power or drawing many walks.

Chatham batted .298/.333/.408 between Double-A and Triple-A at age 24 this season. He's trying to refine his approach and pull and drive pitches more often without sacrificing too much contact. He's off to a good start with the Javelinas, going 6-for-16 (.375) with three doubles in his first four starts, though he committed two errors in three games at second base.

Red Sox hitters in the Fall League

Jarren Duran, OF (No. 4 on Red Sox Top 30): Duran has been a revelation since the Red Sox made him a seventh-round choice out of Long Beach State in 2018, playing in the SiriusXM All-Star Futures Game and reaching Double-A in his first full pro season. He batted .303/.367/.408 with 46 steals in 132 games between two levels while displaying a line-drive bat, well-above-average speed and improving center-field skills.

Marcus Wilson, OF (No. 17): A supplemental second-round pick by the D-backs out of Junipero Serra High School (Calif.) in 2014, Wilson joined the Red Sox in the Blake Swihart trade this July. He possesses solid raw power and speed, and he used them to bat .269/.357/.492 with 18 homers and 13 steals in 119 games between Class A Advanced and Double-A this season.

Red Sox pitchers in the Fall League

Bryan Mata, RHP (No. 3): Mata struggled for most of 2018 despite appearing in the Futures Game at age 19, but then he rebounded this year with a 3.43 ERA and 111 strikeouts in 105 innings while advancing to Double-A. Signed for $25,000 out of the Dominican Republic in '16, he works at 93-98 mph with hard sink on his fastball, and he has improved his slider and control.

Tanner Houck, RHP (No. 5): A first-round pick (24th overall) in the 2017 Draft, Houck started in Double-A and relieved in Triple-A this year, recording a combined 4.01 ERA with 107 strikeouts in 107 2/3 innings. His low-three-quarters crossfire delivery makes him tough on right-handers and produces 92-96 mph fastballs with sink and bore as well as sweeping sliders.

Yoan Aybar, LHP (No. 29): Signed for $450,000 as an outfielder out of the Dominican Republic in 2013, Aybar moved to the mound five years later after he was unable to produce at the plate. Still learning on the mound, he has a fastball that tops out at 99 mph and flashes a sharp slider, a combo that helped him fan 70 in 56 2/3 innings (mostly in Class A) while logging a 4.61 ERA in '19.

Jhonathan Diaz, LHP: A switch-pitcher in Venezuela who became a full-time lefty after signing for $600,000 in 2013, Diaz mixes four average pitches and works off an 89-93 mph sinker. He had a 3.86 ERA with 118 strikeouts in 128 1/3 innings in Class A Advanced this season.