Mass. Gen. Laws ch. 234A § 74
Any irregularity in compiling any list of jurors or prospective jurors; or any irregularity in qualifying, selecting, summoning, confirming, postponing, excusing, cancelling, instructing, impanelling, challenging, discharging, or managing jurors; or any irregularity in limiting any term of juror service, in length or other incident of the term; or the fact that a juror shall be found to be not qualified under section four of this chapter; or any defect in any procedure performed under this chapter shall not be sufficient to cause a mistrial or to set aside a verdict unless objection to such irregularity or defect has been made as soon as possible after its discovery or after it should have been discovered and unless the objecting party has been specially injured or prejudiced thereby.
Mass. Gen. Laws ch. 234A, § 74