BOSTON — The trade deadline passed more than two weeks ago, but that doesn’t mean the Red Sox are done considering external additions to their roster for the home stretch.

According to industry sources, Boston is expected to be in the mix to sign first baseman Nathaniel Lowe , who was designated for assignment by the Nationals earlier this week and is in the process of being unconditionally released. Washington requested release waivers on Lowe on Saturday, so he should become a free agent within the next 48 hours.

At that point, he’ll be able to sign with any team for the prorated portion of the major league minimum. The Red Sox, who could use a left-handed bat at first base, are expected to jump in and pursue Lowe at that point. They could face competition from other contenders loo

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